diff --git a/core/src/main/java/org/openapitools/openapidiff/core/model/ChangedSecurityScheme.java b/core/src/main/java/org/openapitools/openapidiff/core/model/ChangedSecurityScheme.java
index f4a1682f6..2850e0f17 100644
--- a/core/src/main/java/org/openapitools/openapidiff/core/model/ChangedSecurityScheme.java
+++ b/core/src/main/java/org/openapitools/openapidiff/core/model/ChangedSecurityScheme.java
@@ -44,6 +44,13 @@ public DiffResult isCoreChanged() {
         && !changedBearerFormat
         && !changedOpenIdConnectUrl
         && (changedScopes == null || changedScopes.getIncreased().isEmpty())) {
+
+      // TODO: Dead code removal opportunity for changedType and changedIn. It appears that
+      // SecuritySchemaDiff will never be given the chance to detect differences TYPE and
+      // IN differences because that case has already been detected and filtered out by
+      // SecurityRequirementsDiff and recorded as a dropped requirement in
+      // ChangedSecurityRequirements.
+
       return DiffResult.COMPATIBLE;
     }
     return DiffResult.INCOMPATIBLE;
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/BackwardCompatibilityTest.java b/core/src/test/java/org/openapitools/openapidiff/core/BackwardCompatibilityTest.java
deleted file mode 100644
index 612700ca7..000000000
--- a/core/src/test/java/org/openapitools/openapidiff/core/BackwardCompatibilityTest.java
+++ /dev/null
@@ -1,49 +0,0 @@
-package org.openapitools.openapidiff.core;
-
-import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardCompatible;
-import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
-
-import org.junit.jupiter.api.Test;
-
-public class BackwardCompatibilityTest {
-  private final String OPENAPI_DOC1 = "backwardCompatibility/bc_1.yaml";
-  private final String OPENAPI_DOC2 = "backwardCompatibility/bc_2.yaml";
-  private final String OPENAPI_DOC3 = "backwardCompatibility/bc_3.yaml";
-  private final String OPENAPI_DOC4 = "backwardCompatibility/bc_4.yaml";
-  private final String OPENAPI_DOC5 = "backwardCompatibility/bc_5.yaml";
-
-  @Test
-  public void testNoChange() {
-    assertOpenApiBackwardCompatible(OPENAPI_DOC1, OPENAPI_DOC1, false);
-  }
-
-  @Test
-  public void testApiAdded() {
-    assertOpenApiBackwardCompatible(OPENAPI_DOC1, OPENAPI_DOC2, true);
-  }
-
-  @Test
-  public void testApiMissing() {
-    assertOpenApiBackwardIncompatible(OPENAPI_DOC2, OPENAPI_DOC1);
-  }
-
-  @Test
-  public void testApiChangedOperationAdded() {
-    assertOpenApiBackwardCompatible(OPENAPI_DOC2, OPENAPI_DOC3, true);
-  }
-
-  @Test
-  public void testApiChangedOperationMissing() {
-    assertOpenApiBackwardIncompatible(OPENAPI_DOC3, OPENAPI_DOC2);
-  }
-
-  @Test
-  public void testApiOperationChanged() {
-    assertOpenApiBackwardCompatible(OPENAPI_DOC2, OPENAPI_DOC4, true);
-  }
-
-  @Test
-  public void testApiReadWriteOnlyPropertiesChanged() {
-    assertOpenApiBackwardCompatible(OPENAPI_DOC1, OPENAPI_DOC5, true);
-  }
-}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/TestUtils.java b/core/src/test/java/org/openapitools/openapidiff/core/TestUtils.java
index 1180f2886..5e07d0bcd 100644
--- a/core/src/test/java/org/openapitools/openapidiff/core/TestUtils.java
+++ b/core/src/test/java/org/openapitools/openapidiff/core/TestUtils.java
@@ -4,6 +4,7 @@
 import static org.slf4j.LoggerFactory.getLogger;
 
 import org.openapitools.openapidiff.core.model.ChangedOpenApi;
+import org.openapitools.openapidiff.core.model.DiffResult;
 import org.slf4j.Logger;
 
 public class TestUtils {
@@ -25,6 +26,20 @@ public static void assertOpenApiChangedEndpoints(String oldSpec, String newSpec)
     assertThat(changedOpenApi.getChangedOperations()).isNotEmpty();
   }
 
+  public static void assertSpecUnchanged(String oldSpec, String newSpec) {
+    ChangedOpenApi changedOpenApi = OpenApiCompare.fromLocations(oldSpec, newSpec);
+    LOG.info("Result: {}", changedOpenApi.isChanged().getValue());
+    assertThat(changedOpenApi.isUnchanged()).isTrue();
+  }
+
+  public static void assertSpecChangedButCompatible(String oldSpec, String newSpec) {
+    ChangedOpenApi changedOpenApi = OpenApiCompare.fromLocations(oldSpec, newSpec);
+    DiffResult diffResult = changedOpenApi.isChanged();
+    LOG.info("Result: {}", diffResult.getValue());
+    assertThat(diffResult.isDifferent()).isTrue();
+    assertThat(diffResult.isCompatible()).isTrue();
+  }
+
   public static void assertOpenApiBackwardCompatible(
       String oldSpec, String newSpec, boolean isDiff) {
     ChangedOpenApi changedOpenApi = OpenApiCompare.fromLocations(oldSpec, newSpec);
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ApiResponseBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ApiResponseBCTest.java
new file mode 100644
index 000000000..c93bc5d4a
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ApiResponseBCTest.java
@@ -0,0 +1,26 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class ApiResponseBCTest {
+  private final String BASE = "bc_response_apiresponse_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_response_apiresponse_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void decreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_apiresponse_decreased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ContentBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ContentBCTest.java
new file mode 100644
index 000000000..130255b80
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ContentBCTest.java
@@ -0,0 +1,31 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class ContentBCTest {
+  private final String BASE = "bc_content_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_content_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void requestDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_content_decreased.yaml");
+  }
+
+  @Test
+  public void responseDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_content_decreased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/EnumBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/EnumBCTest.java
new file mode 100644
index 000000000..3eecfda39
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/EnumBCTest.java
@@ -0,0 +1,31 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class EnumBCTest {
+  private final String BASE = "bc_enum_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_enum_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void requestDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_enum_decreased.yaml");
+  }
+
+  @Test
+  public void responseIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_enum_increased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/HeaderBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/HeaderBCTest.java
new file mode 100644
index 000000000..d97209d19
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/HeaderBCTest.java
@@ -0,0 +1,37 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class HeaderBCTest {
+  private final String BASE = "bc_response_header_base.yaml";
+
+  @Test
+  public void responseHeaderUnchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void responseHeaderDeprecated() {
+    assertSpecChangedButCompatible(BASE, "bc_response_header_deprecated.yaml");
+  }
+
+  @Test
+  public void responseHeaderRequiredAdded() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_header_required_added.yaml");
+  }
+
+  @Test
+  public void responseHeaderRequiredDeleted() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_header_required_deleted.yaml");
+  }
+
+  @Test
+  public void responseHeaderExplode() {
+    String RESPONSE_HEADER_EXPLODE = "bc_response_header_explode.yaml";
+    assertOpenApiBackwardIncompatible(BASE, RESPONSE_HEADER_EXPLODE);
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/HeadersBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/HeadersBCTest.java
new file mode 100644
index 000000000..b796a35e6
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/HeadersBCTest.java
@@ -0,0 +1,26 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class HeadersBCTest {
+  private final String BASE = "bc_response_headers_base.yaml";
+
+  @Test
+  public void responseHeadersUnchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void responseHeadersIncreased() {
+    assertSpecChangedButCompatible(BASE, "bc_response_headers_increased.yaml");
+  }
+
+  @Test
+  public void responseHeadersMissing() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_headers_missing.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/MaxLengthBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/MaxLengthBCTest.java
new file mode 100644
index 000000000..96c019b40
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/MaxLengthBCTest.java
@@ -0,0 +1,25 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class MaxLengthBCTest {
+  private final String BASE = "bc_maxlength_base.yaml";
+
+  @Test
+  public void maxLengthUnchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void requestMaxLengthDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_maxlength_decreased.yaml");
+  }
+
+  @Test
+  public void responseMaxLengthIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_maxlength_increased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/NumericRangeBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/NumericRangeBCTest.java
new file mode 100644
index 000000000..1f713f98a
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/NumericRangeBCTest.java
@@ -0,0 +1,114 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class NumericRangeBCTest {
+  private final String BASE = "bc_numericrange_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    // TODO: Fix bug where response range-narrowing is deemed incompatible, then test here
+    assertSpecChangedButCompatible(BASE, "bc_numericrange_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void requestExclusiveMaxCreated() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_numericrange_exclusive_max_created.yaml");
+  }
+
+  @Test
+  public void requestExclusiveMaxSet() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_numericrange_exclusive_max_set.yaml");
+  }
+
+  @Test
+  public void requestExclusiveMinCreated() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_numericrange_exclusive_min_created.yaml");
+  }
+
+  @Test
+  public void requestExclusiveMinSet() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_numericrange_exclusive_min_set.yaml");
+  }
+
+  @Test
+  public void requestMaxAdded() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_numericrange_max_added.yaml");
+  }
+
+  @Test
+  public void requestMaxDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_numericrange_max_decreased.yaml");
+  }
+
+  @Test
+  public void requestMinAdded() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_numericrange_min_added.yaml");
+  }
+
+  @Test
+  public void requestMinIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_numericrange_min_increased.yaml");
+  }
+
+  @Test
+  public void responseExclusiveMaxDeleted() {
+    // TODO: Should be incompatible because clients may be unprepared for wider range
+    //  (test added to avoid unintentional regression)
+    assertSpecChangedButCompatible(BASE, "bc_response_numericrange_exclusive_max_deleted.yaml");
+  }
+
+  @Test
+  public void responseExclusiveMaxUnset() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_numericrange_exclusive_max_unset.yaml");
+  }
+
+  @Test
+  public void responseExclusiveMinDeleted() {
+    // TODO: Should be incompatible because clients may be unprepared for wider range
+    //  (test added to avoid unintentional regression)
+    assertSpecChangedButCompatible(BASE, "bc_response_numericrange_exclusive_min_deleted.yaml");
+  }
+
+  @Test
+  public void responseExclusiveMinUnset() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_numericrange_exclusive_min_unset.yaml");
+  }
+
+  @Test
+  public void responseMaxDeleted() {
+    // TODO: Should be incompatible because clients may be unprepared for wider range
+    //  (test added to avoid unintentional regression)
+    assertSpecChangedButCompatible(BASE, "bc_response_numericrange_max_deleted.yaml");
+  }
+
+  @Test
+  public void responseMaxIncreased() {
+    // TODO: Should be incompatible because clients may be unprepared
+    //  (test added to avoid unintentional regression)
+    assertSpecChangedButCompatible(BASE, "bc_response_numericrange_max_increased.yaml");
+  }
+
+  @Test
+  public void responseMinDecreased() {
+    // TODO: Should be incompatible because clients may be unprepared for wider range
+    //  (test added to avoid unintentional regression)
+    assertSpecChangedButCompatible(BASE, "bc_response_numericrange_min_decreased.yaml");
+  }
+
+  @Test
+  public void responseMinDeleted() {
+    // TODO: Should be incompatible because clients may be unprepared for wider range
+    //  (test added to avoid unintentional regression)
+    assertSpecChangedButCompatible(BASE, "bc_response_numericrange_min_deleted.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OAuthFlowBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OAuthFlowBCTest.java
new file mode 100644
index 000000000..62cf3b9a0
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OAuthFlowBCTest.java
@@ -0,0 +1,30 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class OAuthFlowBCTest {
+  private final String BASE = "bc_oauthflow_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void authorizationUrlChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_oauthflow_authorization_url_changed.yaml");
+  }
+
+  @Test
+  public void refreshUrlChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_oauthflow_refresh_url_changed.yaml");
+  }
+
+  @Test
+  public void tokenUrlChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_oauthflow_token_url_changed.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OneOfBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OneOfBCTest.java
new file mode 100644
index 000000000..e42829cca
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OneOfBCTest.java
@@ -0,0 +1,31 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class OneOfBCTest {
+  private final String BASE = "bc_oneof_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_oneof_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void requestOneOfDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_oneof_decreased.yaml");
+  }
+
+  @Test
+  public void responseOneOfIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_oneof_increased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OpenApiBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OpenApiBCTest.java
new file mode 100644
index 000000000..0cb493aa2
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OpenApiBCTest.java
@@ -0,0 +1,26 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class OpenApiBCTest {
+  private final String BASE = "bc_openapi_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_openapi_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void endpointsDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_openapi_endpoints_decreased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OperationBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OperationBCTest.java
new file mode 100644
index 000000000..c95d8c9d2
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/OperationBCTest.java
@@ -0,0 +1,20 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class OperationBCTest {
+  private final String BASE = "bc_operation_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_operation_changed_but_compatible.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ParameterBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ParameterBCTest.java
new file mode 100644
index 000000000..4f1d30852
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ParameterBCTest.java
@@ -0,0 +1,41 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class ParameterBCTest {
+  private final String BASE = "bc_request_param_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_request_param_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void allowEmptyValueDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_param_allowemptyvalue_decreased.yaml");
+  }
+
+  @Test
+  public void explodeChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_param_explode_changed.yaml");
+  }
+
+  @Test
+  public void requiredIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_param_required_increased.yaml");
+  }
+
+  @Test
+  public void styleChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_param_style_changed.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ParametersBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ParametersBCTest.java
new file mode 100644
index 000000000..1b913115d
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ParametersBCTest.java
@@ -0,0 +1,31 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class ParametersBCTest {
+  private final String BASE = "bc_request_params_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_request_params_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void decreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_params_decreased.yaml");
+  }
+
+  @Test
+  public void requiredIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_params_required_increased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/PathBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/PathBCTest.java
new file mode 100644
index 000000000..b0b9ab39c
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/PathBCTest.java
@@ -0,0 +1,26 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class PathBCTest {
+  private final String BASE = "bc_path_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_path_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void opsDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_path_ops_decreased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/PathsBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/PathsBCTest.java
new file mode 100644
index 000000000..495739d18
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/PathsBCTest.java
@@ -0,0 +1,26 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class PathsBCTest {
+  private final String BASE = "bc_paths_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_paths_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void decreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_paths_decreased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ReadOnlyBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ReadOnlyBCTest.java
new file mode 100644
index 000000000..579a7e178
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/ReadOnlyBCTest.java
@@ -0,0 +1,32 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class ReadOnlyBCTest {
+  private final String BASE = "bc_readonly_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_readonly_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void requestReadOnlyIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_readonly_increased.yaml");
+  }
+
+  @Test
+  public void requestReadOnlyRequiredDecreased() {
+    // TODO: Document why desired or remove support (test added to avoid unintentional regression)
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_readonly_required_decreased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/RequestBodyBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/RequestBodyBCTest.java
new file mode 100644
index 000000000..b02c0a3e0
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/RequestBodyBCTest.java
@@ -0,0 +1,20 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class RequestBodyBCTest {
+  private final String BASE = "bc_request_body_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void requiredChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_body_required_changed.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/RequiredBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/RequiredBCTest.java
new file mode 100644
index 000000000..bda8b2d8e
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/RequiredBCTest.java
@@ -0,0 +1,32 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class RequiredBCTest {
+
+  private final String BASE = "bc_required_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_required_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void requestRequiredIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_required_increased.yaml");
+  }
+
+  @Test
+  public void responseRequiredDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_required_decreased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SchemaBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SchemaBCTest.java
new file mode 100644
index 000000000..cec27bc78
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SchemaBCTest.java
@@ -0,0 +1,65 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class SchemaBCTest {
+  private final String BASE = "bc_schema_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_schema_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void discriminatorChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_schema_discriminator_changed.yaml");
+  }
+
+  @Test
+  public void requestFormatDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_schema_format_decreased.yaml");
+  }
+
+  @Test
+  public void requestFormatIncreased() {
+    // TODO: Document why desired or remove support (test added to avoid unintentional regression)
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_schema_format_increased.yaml");
+  }
+
+  @Test
+  public void requestPropsPutIncreased() {
+    // TODO: Document why desired or remove support (test added to avoid unintentional regression)
+    // See https://github.com/OpenAPITools/openapi-diff/issues/537
+    assertOpenApiBackwardIncompatible(BASE, "bc_request_schema_props_put_increased.yaml");
+  }
+
+  @Test
+  public void responseFormatDecreased() {
+    // TODO: Document why desired or remove support (test added to avoid unintentional regression)
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_schema_format_decreased.yaml");
+  }
+
+  @Test
+  public void responseFormatIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_schema_format_increased.yaml");
+  }
+
+  @Test
+  public void responsePropsRequiredDecreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_schema_props_required_decreased.yaml");
+  }
+
+  @Test
+  public void typeChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_schema_type_changed.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecurityRequirementBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecurityRequirementBCTest.java
new file mode 100644
index 000000000..80c79cec9
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecurityRequirementBCTest.java
@@ -0,0 +1,24 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.*;
+
+import org.junit.jupiter.api.Test;
+
+public class SecurityRequirementBCTest {
+  private final String BASE = "bc_security_requirement_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_security_requirement_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void schemesIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_requirement_schemes_increased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecurityRequirementsBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecurityRequirementsBCTest.java
new file mode 100644
index 000000000..a9df11df0
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecurityRequirementsBCTest.java
@@ -0,0 +1,38 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class SecurityRequirementsBCTest {
+  private final String BASE = "bc_security_requirements_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_security_requirements_changed_but_compatible.yaml");
+  }
+
+  // TODO: Dropping *all* security requirements should be compatible. Refactor or document
+  // reasoning. Context: OAS spec is clear that only one of the security requirement objects
+  // need to be satisfied so it makes sense why dropping one could break a client that may
+  // not yet support one of the remaining referenced security schemes. But dropping all
+  // requirements should be compatible.
+  @Test
+  public void decreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_requirements_decreased.yaml");
+  }
+
+  // TODO: A missing incompatible check seems to be if requirements increase from zero to 1 or more
+
+  @Test
+  public void schemeTypeChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_requirements_scheme_type_changed.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecuritySchemeBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecuritySchemeBCTest.java
new file mode 100644
index 000000000..b275523dd
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/SecuritySchemeBCTest.java
@@ -0,0 +1,51 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class SecuritySchemeBCTest {
+  private final String BASE = "bc_security_scheme_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_security_scheme_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void bearerFormatChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_scheme_bearer_format_changed.yaml");
+  }
+
+  @Test
+  public void inChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_scheme_in_changed.yaml");
+  }
+
+  @Test
+  public void openIdConnectUrlChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_scheme_open_id_connect_url_changed.yaml");
+  }
+
+  @Test
+  public void schemeChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_scheme_scheme_changed.yaml");
+  }
+
+  @Test
+  public void typeChanged() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_scheme_type_changed.yaml");
+  }
+
+  @Test
+  public void scopesIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_security_scheme_scopes_increased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/backcompat/WriteOnlyBCTest.java b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/WriteOnlyBCTest.java
new file mode 100644
index 000000000..f3ea427f0
--- /dev/null
+++ b/core/src/test/java/org/openapitools/openapidiff/core/backcompat/WriteOnlyBCTest.java
@@ -0,0 +1,32 @@
+package org.openapitools.openapidiff.core.backcompat;
+
+import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecChangedButCompatible;
+import static org.openapitools.openapidiff.core.TestUtils.assertSpecUnchanged;
+
+import org.junit.jupiter.api.Test;
+
+public class WriteOnlyBCTest {
+  private final String BASE = "bc_writeonly_base.yaml";
+
+  @Test
+  public void unchanged() {
+    assertSpecUnchanged(BASE, BASE);
+  }
+
+  @Test
+  public void changedButCompatible() {
+    assertSpecChangedButCompatible(BASE, "bc_writeonly_changed_but_compatible.yaml");
+  }
+
+  @Test
+  public void responseWriteOnlyIncreased() {
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_writeonly_increased.yaml");
+  }
+
+  @Test
+  public void responseWriteOnlyRequiredDecreased() {
+    // TODO: Document why desired or remove support (test added to avoid unintentional regression)
+    assertOpenApiBackwardIncompatible(BASE, "bc_response_writeonly_required_decreased.yaml");
+  }
+}
diff --git a/core/src/test/java/org/openapitools/openapidiff/core/compare/ApiResponseDiffTest.java b/core/src/test/java/org/openapitools/openapidiff/core/compare/ApiResponseDiffTest.java
deleted file mode 100644
index 97b8ab094..000000000
--- a/core/src/test/java/org/openapitools/openapidiff/core/compare/ApiResponseDiffTest.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package org.openapitools.openapidiff.core.compare;
-
-import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardCompatible;
-import static org.openapitools.openapidiff.core.TestUtils.assertOpenApiBackwardIncompatible;
-
-import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.Test;
-
-class ApiResponseDiffTest extends Assertions {
-  /**
-   * * This is a regression test - when no responses were set, we would get an exception since the
-   * OpenAPI object has a `null` ApiResponses field.
-   */
-  @Test
-  public void testNoResponseInPrevious() {
-    // The previous API had no response, so adding a response shape is still compatible.
-    assertOpenApiBackwardCompatible(
-        "backwardCompatibility/apiResponse_diff_1.yaml",
-        "backwardCompatibility/apiResponse_diff_2.yaml",
-        true);
-
-    // Removing the response shape is backwards incompatible.
-    assertOpenApiBackwardIncompatible(
-        "backwardCompatibility/apiResponse_diff_2.yaml",
-        "backwardCompatibility/apiResponse_diff_1.yaml");
-  }
-}
diff --git a/core/src/test/resources/backwardCompatibility/apiResponse_diff_1.yaml b/core/src/test/resources/backwardCompatibility/apiResponse_diff_1.yaml
deleted file mode 100644
index fb1e6047d..000000000
--- a/core/src/test/resources/backwardCompatibility/apiResponse_diff_1.yaml
+++ /dev/null
@@ -1,7 +0,0 @@
-openapi: 3.0.0
-info:
-  title: Swagger Petstore
-paths:
-  /store/inventory:
-    get:
-      operationId: asdf
\ No newline at end of file
diff --git a/core/src/test/resources/backwardCompatibility/apiResponse_diff_2.yaml b/core/src/test/resources/backwardCompatibility/apiResponse_diff_2.yaml
deleted file mode 100644
index 82da7cfd6..000000000
--- a/core/src/test/resources/backwardCompatibility/apiResponse_diff_2.yaml
+++ /dev/null
@@ -1,15 +0,0 @@
-openapi: 3.0.0
-info:
-  title: Swagger Petstore
-paths:
-  /store/inventory:
-    get:
-      responses:
-        '200':
-          content:
-            application/json:
-              schema:
-                type: object
-                properties:
-                  title:
-                    type: string
\ No newline at end of file
diff --git a/core/src/test/resources/backwardCompatibility/bc_1.yaml b/core/src/test/resources/backwardCompatibility/bc_1.yaml
deleted file mode 100644
index 8247d2fcb..000000000
--- a/core/src/test/resources/backwardCompatibility/bc_1.yaml
+++ /dev/null
@@ -1,132 +0,0 @@
-openapi: 3.0.0
-servers:
-  - url: 'http://petstore.swagger.io/v2'
-info:
-  description: >-
-    This is a sample server Petstore server.  You can find out more about
-    Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net,
-    #swagger](http://swagger.io/irc/).  For this sample, you can use the api key
-    `special-key` to test the authorization filters.
-  version: 1.0.0
-  title: Swagger Petstore
-  termsOfService: 'http://swagger.io/terms/'
-  contact:
-    email: apiteam@swagger.io
-  license:
-    name: Apache 2.0
-    url: 'http://www.apache.org/licenses/LICENSE-2.0.html'
-tags:
-  - name: pet
-    description: Everything about your Pets
-    externalDocs:
-      description: Find out more
-      url: 'http://swagger.io'
-  - name: store
-    description: Access to Petstore orders
-  - name: user
-    description: Operations about user
-    externalDocs:
-      description: Find out more about our store
-      url: 'http://swagger.io'
-paths:
-  /pet/findByStatus:
-    get:
-      tags:
-        - pet
-      summary: Finds Pets by status
-      description: Multiple status values can be provided with comma separated strings
-      operationId: findPetsByStatus
-      parameters:
-        - name: status
-          in: query
-          description: Status values that need to be considered for filter
-          required: true
-          explode: true
-          schema:
-            type: array
-            items:
-              type: string
-              maxLength: 16
-      responses:
-        '200':
-          description: successful operation
-          content:
-            application/json:
-              schema:
-                type: object
-                properties:
-                  pets:
-                    type: array
-                    items:
-                      $ref: '#/components/schemas/Dog'
-        '400':
-          description: Invalid status value
-      security:
-        - petstore_auth:
-            - 'write:pets'
-            - 'read:pets'
-externalDocs:
-  description: Find out more about Swagger
-  url: 'http://swagger.io'
-components:
-  requestBodies:
-    Pet:
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Pet'
-      description: Pet object that needs to be added to the store
-      required: true
-  securitySchemes:
-    petstore_auth:
-      type: oauth2
-      flows:
-        implicit:
-          authorizationUrl: 'http://petstore.swagger.io/oauth/dialog'
-          scopes:
-            'write:pets': modify pets in your account
-            'read:pets': read your pets
-    api_key:
-      type: apiKey
-      name: api_key
-      in: header
-  schemas:
-    Pet:
-      type: object
-      required:
-      - pet_type
-      properties:
-        pet_type:
-          type: string
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          cachorro: Dog
-    Cat:
-      type: object
-      properties:
-        name:
-          type: string
-    Dog:
-      type: object
-      properties:
-        bark:
-          type: string
-        test:
-          writeOnly: true
-          type: string
-    Lizard:
-      type: object
-      properties:
-        lovesRocks:
-          type: boolean
-
-    MyResponseType:
-      oneOf:
-      - $ref: '#/components/schemas/Cat'
-      - $ref: '#/components/schemas/Dog'
-      - $ref: '#/components/schemas/Lizard'
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          dog: '#/components/schemas/Dog'
\ No newline at end of file
diff --git a/core/src/test/resources/backwardCompatibility/bc_2.yaml b/core/src/test/resources/backwardCompatibility/bc_2.yaml
deleted file mode 100644
index 179f3ca3f..000000000
--- a/core/src/test/resources/backwardCompatibility/bc_2.yaml
+++ /dev/null
@@ -1,150 +0,0 @@
-openapi: 3.0.0
-servers:
-  - url: 'http://petstore.swagger.io/v2'
-info:
-  description: >-
-    This is a sample server Petstore server.  You can find out more about
-    Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net,
-    #swagger](http://swagger.io/irc/).  For this sample, you can use the api key
-    `special-key` to test the authorization filters.
-  version: 1.0.0
-  title: Swagger Petstore
-  termsOfService: 'http://swagger.io/terms/'
-  contact:
-    email: apiteam@swagger.io
-  license:
-    name: Apache 2.0
-    url: 'http://www.apache.org/licenses/LICENSE-2.0.html'
-tags:
-  - name: pet
-    description: Everything about your Pets
-    externalDocs:
-      description: Find out more
-      url: 'http://swagger.io'
-  - name: store
-    description: Access to Petstore orders
-  - name: user
-    description: Operations about user
-    externalDocs:
-      description: Find out more about our store
-      url: 'http://swagger.io'
-paths:
-  /pet:
-    post:
-      tags:
-        - pet
-      summary: Add a new pet to the store
-      description: ''
-      operationId: addPet
-      requestBody:
-        $ref: '#/components/requestBodies/Pet'
-      responses:
-        '200':
-          description: successful operation
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/MyResponseType'
-        '405':
-          description: Invalid input
-  /pet/findByStatus:
-    get:
-      tags:
-        - pet
-      summary: Finds Pets by status
-      description: Multiple status values can be provided with comma separated strings
-      operationId: findPetsByStatus
-      parameters:
-        - name: status
-          in: query
-          description: Status values that need to be considered for filter
-          required: true
-          explode: true
-          schema:
-            type: array
-            items:
-              type: string
-              maxLength: 24
-      responses:
-        '200':
-          description: successful operation
-          content:
-            application/json:
-              schema:
-                type: object
-                properties:
-                  pets:
-                    type: array
-                    items:
-                      $ref: '#/components/schemas/Dog'
-        '400':
-          description: Invalid status value
-      security:
-        - petstore_auth:
-            - 'write:pets'
-            - 'read:pets'
-externalDocs:
-  description: Find out more about Swagger
-  url: 'http://swagger.io'
-components:
-  requestBodies:
-    Pet:
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Pet'
-      description: Pet object that needs to be added to the store
-      required: true
-  securitySchemes:
-    petstore_auth:
-      type: oauth2
-      flows:
-        implicit:
-          authorizationUrl: 'http://petstore.swagger.io/oauth/dialog'
-          scopes:
-            'write:pets': modify pets in your account
-            'read:pets': read your pets
-    api_key:
-      type: apiKey
-      name: api_key
-      in: header
-  schemas:
-    Pet:
-      type: object
-      required:
-      - pet_type
-      properties:
-        pet_type:
-          type: string
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          cachorro: Dog
-    Cat:
-      type: object
-      properties:
-        name:
-          type: string
-    Dog:
-      type: object
-      properties:
-        bark:
-          type: string
-        test:
-          writeOnly: true
-          type: string
-    Lizard:
-      type: object
-      properties:
-        lovesRocks:
-          type: boolean
-
-    MyResponseType:
-      oneOf:
-      - $ref: '#/components/schemas/Cat'
-      - $ref: '#/components/schemas/Dog'
-      - $ref: '#/components/schemas/Lizard'
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          dog: '#/components/schemas/Dog'
\ No newline at end of file
diff --git a/core/src/test/resources/backwardCompatibility/bc_3.yaml b/core/src/test/resources/backwardCompatibility/bc_3.yaml
deleted file mode 100644
index 30a68ced7..000000000
--- a/core/src/test/resources/backwardCompatibility/bc_3.yaml
+++ /dev/null
@@ -1,163 +0,0 @@
-openapi: 3.0.0
-servers:
-  - url: 'http://petstore.swagger.io/v2'
-info:
-  description: >-
-    This is a sample server Petstore server.  You can find out more about
-    Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net,
-    #swagger](http://swagger.io/irc/).  For this sample, you can use the api key
-    `special-key` to test the authorization filters.
-  version: 1.0.0
-  title: Swagger Petstore
-  termsOfService: 'http://swagger.io/terms/'
-  contact:
-    email: apiteam@swagger.io
-  license:
-    name: Apache 2.0
-    url: 'http://www.apache.org/licenses/LICENSE-2.0.html'
-tags:
-  - name: pet
-    description: Everything about your Pets
-    externalDocs:
-      description: Find out more
-      url: 'http://swagger.io'
-  - name: store
-    description: Access to Petstore orders
-  - name: user
-    description: Operations about user
-    externalDocs:
-      description: Find out more about our store
-      url: 'http://swagger.io'
-paths:
-  /pet:
-    post:
-      tags:
-        - pet
-      summary: Add a new pet to the store
-      description: ''
-      operationId: addPet
-      requestBody:
-        $ref: '#/components/requestBodies/Pet'
-      responses:
-        '200':
-          description: successful operation
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/MyResponseType'
-        '405':
-          description: Invalid input
-    get:
-      tags:
-        - pet
-      summary: Finds Pets by name
-      description: name can be provided for the pet
-      operationId: getPet
-      parameters:
-        - name: name
-          in: query
-          description: name that need to be considered for filter
-          required: true
-          schema:
-            type: string
-  /pet/findByStatus:
-    get:
-      tags:
-        - pet
-      summary: Finds Pets by status
-      description: Multiple status values can be provided with comma separated strings
-      operationId: findPetsByStatus
-      parameters:
-        - name: status
-          in: query
-          description: Status values that need to be considered for filter
-          required: true
-          explode: true
-          schema:
-            type: array
-            items:
-              type: string
-              maxLength: 36
-      responses:
-        '200':
-          description: successful operation
-          content:
-            application/json:
-              schema:
-                type: object
-                properties:
-                  pets:
-                    type: array
-                    items:
-                      $ref: '#/components/schemas/Dog'
-        '400':
-          description: Invalid status value
-      security:
-        - petstore_auth:
-            - 'write:pets'
-            - 'read:pets'
-externalDocs:
-  description: Find out more about Swagger
-  url: 'http://swagger.io'
-components:
-  requestBodies:
-    Pet:
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Pet'
-      description: Pet object that needs to be added to the store
-      required: true
-  securitySchemes:
-    petstore_auth:
-      type: oauth2
-      flows:
-        implicit:
-          authorizationUrl: 'http://petstore.swagger.io/oauth/dialog'
-          scopes:
-            'write:pets': modify pets in your account
-            'read:pets': read your pets
-    api_key:
-      type: apiKey
-      name: api_key
-      in: header
-  schemas:
-    Pet:
-      type: object
-      required:
-      - pet_type
-      properties:
-        pet_type:
-          type: string
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          cachorro: Dog
-    Cat:
-      type: object
-      properties:
-        name:
-          type: string
-    Dog:
-      type: object
-      properties:
-        bark:
-          type: string
-        test:
-          writeOnly: true
-          type: string
-    Lizard:
-      type: object
-      properties:
-        lovesRocks:
-          type: boolean
-
-    MyResponseType:
-      oneOf:
-      - $ref: '#/components/schemas/Cat'
-      - $ref: '#/components/schemas/Dog'
-      - $ref: '#/components/schemas/Lizard'
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          dog: '#/components/schemas/Dog'
\ No newline at end of file
diff --git a/core/src/test/resources/backwardCompatibility/bc_4.yaml b/core/src/test/resources/backwardCompatibility/bc_4.yaml
deleted file mode 100644
index 4e6ee3e18..000000000
--- a/core/src/test/resources/backwardCompatibility/bc_4.yaml
+++ /dev/null
@@ -1,155 +0,0 @@
-openapi: 3.0.0
-servers:
-  - url: 'http://petstore.swagger.io/v2'
-info:
-  description: >-
-    This is a sample server Petstore server.  You can find out more about
-    Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net,
-    #swagger](http://swagger.io/irc/).  For this sample, you can use the api key
-    `special-key` to test the authorization filters.
-  version: 1.0.0
-  title: Swagger Petstore
-  termsOfService: 'http://swagger.io/terms/'
-  contact:
-    email: apiteam@swagger.io
-  license:
-    name: Apache 2.0
-    url: 'http://www.apache.org/licenses/LICENSE-2.0.html'
-tags:
-  - name: pet
-    description: Everything about your Pets
-    externalDocs:
-      description: Find out more
-      url: 'http://swagger.io'
-  - name: store
-    description: Access to Petstore orders
-  - name: user
-    description: Operations about user
-    externalDocs:
-      description: Find out more about our store
-      url: 'http://swagger.io'
-paths:
-  /pet:
-    post:
-      tags:
-        - pet
-      summary: Add a new pet to the store
-      description: ''
-      operationId: addPet
-      requestBody:
-        $ref: '#/components/requestBodies/Pet'
-      responses:
-        '200':
-          description: successful operation
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/MyResponseType'
-        '405':
-          description: Invalid input
-  /pet/findByStatus:
-    get:
-      tags:
-        - pet
-      summary: Finds Pets by status
-      description: Multiple status values can be provided with comma separated strings
-      operationId: findPetsByStatus
-      parameters:
-        - name: status
-          in: query
-          description: Status values that need to be considered for filter
-          required: true
-          explode: true
-          schema:
-            type: array
-            items:
-              type: string
-              enum:
-                - available
-                - pending
-                - sold
-              default: available
-      responses:
-        '200':
-          description: successful operation
-          content:
-            application/json:
-              schema:
-                type: object
-                properties:
-                  pets:
-                    type: array
-                    items:
-                      $ref: '#/components/schemas/Dog'
-        '400':
-          description: Invalid status value
-      security:
-        - petstore_auth:
-            - 'write:pets'
-            - 'read:pets'
-externalDocs:
-  description: Find out more about Swagger
-  url: 'http://swagger.io'
-components:
-  requestBodies:
-    Pet:
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Pet'
-      description: Pet object that needs to be added to the store
-      required: true
-  securitySchemes:
-    petstore_auth:
-      type: oauth2
-      flows:
-        implicit:
-          authorizationUrl: 'http://petstore.swagger.io/oauth/dialog'
-          scopes:
-            'write:pets': modify pets in your account
-            'read:pets': read your pets
-    api_key:
-      type: apiKey
-      name: api_key
-      in: header
-  schemas:
-    Pet:
-      type: object
-      required:
-      - pet_type
-      properties:
-        pet_type:
-          type: string
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          cachorro: Dog
-    Cat:
-      type: object
-      properties:
-        name:
-          type: string
-          deprecated: true
-    Dog:
-      type: object
-      properties:
-        bark:
-          type: string
-        test:
-          writeOnly: true
-          type: string
-    Lizard:
-      type: object
-      properties:
-        lovesRocks:
-          type: boolean
-
-    MyResponseType:
-      oneOf:
-      - $ref: '#/components/schemas/Cat'
-      - $ref: '#/components/schemas/Dog'
-      - $ref: '#/components/schemas/Lizard'
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          dog: '#/components/schemas/Dog'
\ No newline at end of file
diff --git a/core/src/test/resources/backwardCompatibility/bc_5.yaml b/core/src/test/resources/backwardCompatibility/bc_5.yaml
deleted file mode 100644
index 6b282ba48..000000000
--- a/core/src/test/resources/backwardCompatibility/bc_5.yaml
+++ /dev/null
@@ -1,131 +0,0 @@
-openapi: 3.0.0
-servers:
-  - url: 'http://petstore.swagger.io/v2'
-info:
-  description: >-
-    This is a sample server Petstore server.  You can find out more about
-    Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net,
-    #swagger](http://swagger.io/irc/).  For this sample, you can use the api key
-    `special-key` to test the authorization filters.
-  version: 1.0.0
-  title: Swagger Petstore
-  termsOfService: 'http://swagger.io/terms/'
-  contact:
-    email: apiteam@swagger.io
-  license:
-    name: Apache 2.0
-    url: 'http://www.apache.org/licenses/LICENSE-2.0.html'
-tags:
-  - name: pet
-    description: Everything about your Pets
-    externalDocs:
-      description: Find out more
-      url: 'http://swagger.io'
-  - name: store
-    description: Access to Petstore orders
-  - name: user
-    description: Operations about user
-    externalDocs:
-      description: Find out more about our store
-      url: 'http://swagger.io'
-paths:
-  /pet/findByStatus:
-    get:
-      tags:
-        - pet
-      summary: Finds Pets by status
-      description: Multiple status values can be provided with comma separated strings
-      operationId: findPetsByStatus
-      parameters:
-        - name: status
-          in: query
-          description: Status values that need to be considered for filter
-          required: true
-          explode: true
-          schema:
-            type: array
-            items:
-              type: string
-              maxLength: 16
-      responses:
-        '200':
-          description: successful operation
-          content:
-            application/json:
-              schema:
-                type: object
-                properties:
-                  pets:
-                    type: array
-                    items:
-                      $ref: '#/components/schemas/Dog'
-        '400':
-          description: Invalid status value
-      security:
-        - petstore_auth:
-            - 'write:pets'
-            - 'read:pets'
-externalDocs:
-  description: Find out more about Swagger
-  url: 'http://swagger.io'
-components:
-  requestBodies:
-    Pet:
-      content:
-        application/json:
-          schema:
-            $ref: '#/components/schemas/Pet'
-      description: Pet object that needs to be added to the store
-      required: true
-  securitySchemes:
-    petstore_auth:
-      type: oauth2
-      flows:
-        implicit:
-          authorizationUrl: 'http://petstore.swagger.io/oauth/dialog'
-          scopes:
-            'write:pets': modify pets in your account
-            'read:pets': read your pets
-    api_key:
-      type: apiKey
-      name: api_key
-      in: header
-  schemas:
-    Pet:
-      type: object
-      required:
-      - pet_type
-      properties:
-        pet_type:
-          type: string
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          cachorro: Dog
-    Cat:
-      type: object
-      properties:
-        name:
-          type: string
-    Dog:
-      type: object
-      properties:
-        bark:
-          type: string
-        test:
-          type: string
-    Lizard:
-      type: object
-      properties:
-        lovesRocks:
-          type: boolean
-
-    MyResponseType:
-      oneOf:
-      - $ref: '#/components/schemas/Cat'
-      - $ref: '#/components/schemas/Dog'
-      - $ref: '#/components/schemas/Lizard'
-      discriminator:
-        propertyName: pet_type
-        mapping:
-          dog: '#/components/schemas/Dog'
\ No newline at end of file
diff --git a/core/src/test/resources/bc_content_base.yaml b/core/src/test/resources/bc_content_base.yaml
new file mode 100644
index 000000000..82634f2a9
--- /dev/null
+++ b/core/src/test/resources/bc_content_base.yaml
@@ -0,0 +1,29 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+          application/text:
+            schema:
+              type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+            application/text:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_content_changed_but_compatible.yaml b/core/src/test/resources/bc_content_changed_but_compatible.yaml
new file mode 100644
index 000000000..8300fbad7
--- /dev/null
+++ b/core/src/test/resources/bc_content_changed_but_compatible.yaml
@@ -0,0 +1,35 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+          application/text:
+            schema:
+              type: string
+          application/xml:
+            schema:
+              type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+            application/text:
+              schema:
+                type: string
+            application/xml:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_enum_base.yaml b/core/src/test/resources/bc_enum_base.yaml
new file mode 100644
index 000000000..fe020824a
--- /dev/null
+++ b/core/src/test/resources/bc_enum_base.yaml
@@ -0,0 +1,33 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: param-inline-enum
+          in: query
+          required: true
+          schema:
+            type: string
+            enum:
+              - param-inline-enum-val-1
+              - param-inline-enum-val-2
+            default: param-inline-enum-val-1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  enum-prop:
+                    type: string
+                    enum:
+                      - enum-prop-val-1
+                      - enum-prop-val-2
+                    default: enum-prop-val-1
diff --git a/core/src/test/resources/bc_enum_changed_but_compatible.yaml b/core/src/test/resources/bc_enum_changed_but_compatible.yaml
new file mode 100644
index 000000000..7fd9b1da6
--- /dev/null
+++ b/core/src/test/resources/bc_enum_changed_but_compatible.yaml
@@ -0,0 +1,33 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: param-inline-enum
+          in: query
+          required: true
+          schema:
+            type: string
+            enum:
+              - param-inline-enum-val-1
+              - param-inline-enum-val-2
+              - param-inline-enum-val-3
+            default: param-inline-enum-val-1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  enum-prop:
+                    type: string
+                    enum:
+                      - enum-prop-val-1
+                    default: enum-prop-val-1
diff --git a/core/src/test/resources/bc_maxlength_base.yaml b/core/src/test/resources/bc_maxlength_base.yaml
new file mode 100644
index 000000000..583adca5d
--- /dev/null
+++ b/core/src/test/resources/bc_maxlength_base.yaml
@@ -0,0 +1,29 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: string
+              maxLength: 16
+          application/xml:
+            schema:
+              type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+                maxLength: 16
+            application/xml:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_numericrange_base.yaml b/core/src/test/resources/bc_numericrange_base.yaml
new file mode 100644
index 000000000..e03c5939e
--- /dev/null
+++ b/core/src/test/resources/bc_numericrange_base.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_numericrange_changed_but_compatible.yaml b/core/src/test/resources/bc_numericrange_changed_but_compatible.yaml
new file mode 100644
index 000000000..b38f2fe9e
--- /dev/null
+++ b/core/src/test/resources/bc_numericrange_changed_but_compatible.yaml
@@ -0,0 +1,57 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 9
+              maximum: 21
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 9
+              maximum: 21
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                # TODO: Narrowing response range fails as incompatible, but shouldn't it be ok?
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                # TODO: Narrowing response range fails as incompatible, but shouldn't it be ok?
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_oauthflow_authorization_url_changed.yaml b/core/src/test/resources/bc_oauthflow_authorization_url_changed.yaml
new file mode 100644
index 000000000..d14957eea
--- /dev/null
+++ b/core/src/test/resources/bc_oauthflow_authorization_url_changed.yaml
@@ -0,0 +1,28 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - oauth2-scheme-1: []
+components:
+  securitySchemes:
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/authorization2
+          refreshUrl: https://example.com/api/oauth/refresh
+          tokenUrl: https://example.com/api/oauth/token
+          scopes: {}
diff --git a/core/src/test/resources/bc_oauthflow_base.yaml b/core/src/test/resources/bc_oauthflow_base.yaml
new file mode 100644
index 000000000..40c7509b4
--- /dev/null
+++ b/core/src/test/resources/bc_oauthflow_base.yaml
@@ -0,0 +1,28 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - oauth2-scheme-1: []
+components:
+  securitySchemes:
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/authorization
+          refreshUrl: https://example.com/api/oauth/refresh
+          tokenUrl: https://example.com/api/oauth/token
+          scopes: {}
diff --git a/core/src/test/resources/bc_oauthflow_refresh_url_changed.yaml b/core/src/test/resources/bc_oauthflow_refresh_url_changed.yaml
new file mode 100644
index 000000000..bde8f2285
--- /dev/null
+++ b/core/src/test/resources/bc_oauthflow_refresh_url_changed.yaml
@@ -0,0 +1,28 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - oauth2-scheme-1: []
+components:
+  securitySchemes:
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/authorization
+          refreshUrl: https://example.com/api/oauth/refresh2
+          tokenUrl: https://example.com/api/oauth/token
+          scopes: {}
diff --git a/core/src/test/resources/bc_oauthflow_token_url_changed.yaml b/core/src/test/resources/bc_oauthflow_token_url_changed.yaml
new file mode 100644
index 000000000..6992e3c07
--- /dev/null
+++ b/core/src/test/resources/bc_oauthflow_token_url_changed.yaml
@@ -0,0 +1,28 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - oauth2-scheme-1: []
+components:
+  securitySchemes:
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/authorization
+          refreshUrl: https://example.com/api/oauth/refresh
+          tokenUrl: https://example.com/api/oauth/token2
+          scopes: {}
diff --git a/core/src/test/resources/bc_oneof_base.yaml b/core/src/test/resources/bc_oneof_base.yaml
new file mode 100644
index 000000000..b5ef92c35
--- /dev/null
+++ b/core/src/test/resources/bc_oneof_base.yaml
@@ -0,0 +1,48 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+    WidgetCreateResponse:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+    Doodad:
+      type: object
+      properties:
+        doodad_prop1:
+          type: string
+    Gadget:
+      type: object
+      properties:
+        gadget_prop1:
+          type: string
+    Gizmo:
+      type: object
+      properties:
+        gizmo_prop1:
+          type: string
diff --git a/core/src/test/resources/bc_oneof_changed_but_compatible.yaml b/core/src/test/resources/bc_oneof_changed_but_compatible.yaml
new file mode 100644
index 000000000..78468ebe0
--- /dev/null
+++ b/core/src/test/resources/bc_oneof_changed_but_compatible.yaml
@@ -0,0 +1,48 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+        - $ref: '#/components/schemas/Gizmo'
+    WidgetCreateResponse:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+    Doodad:
+      type: object
+      properties:
+        doodad_prop1:
+          type: string
+    Gadget:
+      type: object
+      properties:
+        gadget_prop1:
+          type: string
+    Gizmo:
+      type: object
+      properties:
+        gizmo_prop1:
+          type: string
diff --git a/core/src/test/resources/bc_openapi_base.yaml b/core/src/test/resources/bc_openapi_base.yaml
new file mode 100644
index 000000000..78e86b943
--- /dev/null
+++ b/core/src/test/resources/bc_openapi_base.yaml
@@ -0,0 +1,25 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+    post:
+      operationId: widgetCreate
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_openapi_changed_but_compatible.yaml b/core/src/test/resources/bc_openapi_changed_but_compatible.yaml
new file mode 100644
index 000000000..5b5dfffc1
--- /dev/null
+++ b/core/src/test/resources/bc_openapi_changed_but_compatible.yaml
@@ -0,0 +1,35 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+    post:
+      operationId: widgetCreate
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+  /widgets/{id}:
+    get:
+      operationId: getWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_openapi_endpoints_decreased.yaml b/core/src/test/resources/bc_openapi_endpoints_decreased.yaml
new file mode 100644
index 000000000..bd33b69dd
--- /dev/null
+++ b/core/src/test/resources/bc_openapi_endpoints_decreased.yaml
@@ -0,0 +1,16 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_operation_base.yaml b/core/src/test/resources/bc_operation_base.yaml
new file mode 100644
index 000000000..eb6403307
--- /dev/null
+++ b/core/src/test/resources/bc_operation_base.yaml
@@ -0,0 +1,16 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_operation_changed_but_compatible.yaml b/core/src/test/resources/bc_operation_changed_but_compatible.yaml
new file mode 100644
index 000000000..2d99878b8
--- /dev/null
+++ b/core/src/test/resources/bc_operation_changed_but_compatible.yaml
@@ -0,0 +1,17 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      deprecated: true
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_path_base.yaml b/core/src/test/resources/bc_path_base.yaml
new file mode 100644
index 000000000..78e86b943
--- /dev/null
+++ b/core/src/test/resources/bc_path_base.yaml
@@ -0,0 +1,25 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+    post:
+      operationId: widgetCreate
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_path_changed_but_compatible.yaml b/core/src/test/resources/bc_path_changed_but_compatible.yaml
new file mode 100644
index 000000000..d2ae98018
--- /dev/null
+++ b/core/src/test/resources/bc_path_changed_but_compatible.yaml
@@ -0,0 +1,34 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+    post:
+      operationId: widgetCreate
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+    put:
+      operationId: widgetUpdate
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_path_ops_decreased.yaml b/core/src/test/resources/bc_path_ops_decreased.yaml
new file mode 100644
index 000000000..eb6403307
--- /dev/null
+++ b/core/src/test/resources/bc_path_ops_decreased.yaml
@@ -0,0 +1,16 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_paths_base.yaml b/core/src/test/resources/bc_paths_base.yaml
new file mode 100644
index 000000000..451f66310
--- /dev/null
+++ b/core/src/test/resources/bc_paths_base.yaml
@@ -0,0 +1,26 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+  /widgets/{id}:
+    get:
+      operationId: getWidget
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_paths_changed_but_compatible.yaml b/core/src/test/resources/bc_paths_changed_but_compatible.yaml
new file mode 100644
index 000000000..e2b94c228
--- /dev/null
+++ b/core/src/test/resources/bc_paths_changed_but_compatible.yaml
@@ -0,0 +1,36 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+  /widgets/{id}:
+    get:
+      operationId: getWidget
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+  /widgets/{id}/status:
+    get:
+      operationId: getWidgetStatus
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_paths_decreased.yaml b/core/src/test/resources/bc_paths_decreased.yaml
new file mode 100644
index 000000000..eb6403307
--- /dev/null
+++ b/core/src/test/resources/bc_paths_decreased.yaml
@@ -0,0 +1,16 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_readonly_base.yaml b/core/src/test/resources/bc_readonly_base.yaml
new file mode 100644
index 000000000..dc4889b1f
--- /dev/null
+++ b/core/src/test/resources/bc_readonly_base.yaml
@@ -0,0 +1,33 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                  readOnly: true
+                prop2:
+                  type: string
+              required:
+                - prop1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                    readOnly: true
diff --git a/core/src/test/resources/bc_readonly_changed_but_compatible.yaml b/core/src/test/resources/bc_readonly_changed_but_compatible.yaml
new file mode 100644
index 000000000..cc6596ef6
--- /dev/null
+++ b/core/src/test/resources/bc_readonly_changed_but_compatible.yaml
@@ -0,0 +1,32 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                  readOnly: true
+                prop2:
+                  type: string
+              required:
+                - prop1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
diff --git a/core/src/test/resources/bc_request_body_base.yaml b/core/src/test/resources/bc_request_body_base.yaml
new file mode 100644
index 000000000..fd89553e9
--- /dev/null
+++ b/core/src/test/resources/bc_request_body_base.yaml
@@ -0,0 +1,21 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_body_required_changed.yaml b/core/src/test/resources/bc_request_body_required_changed.yaml
new file mode 100644
index 000000000..859512ca9
--- /dev/null
+++ b/core/src/test/resources/bc_request_body_required_changed.yaml
@@ -0,0 +1,22 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: string
+        required: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_content_decreased.yaml b/core/src/test/resources/bc_request_content_decreased.yaml
new file mode 100644
index 000000000..d7a5517de
--- /dev/null
+++ b/core/src/test/resources/bc_request_content_decreased.yaml
@@ -0,0 +1,26 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+            application/text:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_enum_decreased.yaml b/core/src/test/resources/bc_request_enum_decreased.yaml
new file mode 100644
index 000000000..c131e9aa7
--- /dev/null
+++ b/core/src/test/resources/bc_request_enum_decreased.yaml
@@ -0,0 +1,32 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: param-inline-enum
+          in: query
+          required: true
+          schema:
+            type: string
+            enum:
+              - param-inline-enum-val-1
+            default: param-inline-enum-val-1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  enum-prop:
+                    type: string
+                    enum:
+                      - enum-prop-val-1
+                      - enum-prop-val-2
+                    default: enum-prop-val-1
diff --git a/core/src/test/resources/bc_request_maxlength_decreased.yaml b/core/src/test/resources/bc_request_maxlength_decreased.yaml
new file mode 100644
index 000000000..48d50863c
--- /dev/null
+++ b/core/src/test/resources/bc_request_maxlength_decreased.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: string
+              maxLength: 10
+          application/xml:
+            schema:
+              type: string
+              maxLength: 10
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+                maxLength: 16
+            application/xml:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_numericrange_exclusive_max_created.yaml b/core/src/test/resources/bc_request_numericrange_exclusive_max_created.yaml
new file mode 100644
index 000000000..f893a9545
--- /dev/null
+++ b/core/src/test/resources/bc_request_numericrange_exclusive_max_created.yaml
@@ -0,0 +1,56 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMaximum: true
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_request_numericrange_exclusive_max_set.yaml b/core/src/test/resources/bc_request_numericrange_exclusive_max_set.yaml
new file mode 100644
index 000000000..efa02f990
--- /dev/null
+++ b/core/src/test/resources/bc_request_numericrange_exclusive_max_set.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: true
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_request_numericrange_exclusive_min_created.yaml b/core/src/test/resources/bc_request_numericrange_exclusive_min_created.yaml
new file mode 100644
index 000000000..649b7f48b
--- /dev/null
+++ b/core/src/test/resources/bc_request_numericrange_exclusive_min_created.yaml
@@ -0,0 +1,56 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_request_numericrange_exclusive_min_set.yaml b/core/src/test/resources/bc_request_numericrange_exclusive_min_set.yaml
new file mode 100644
index 000000000..e6d0c81fb
--- /dev/null
+++ b/core/src/test/resources/bc_request_numericrange_exclusive_min_set.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: true
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_request_numericrange_max_added.yaml b/core/src/test/resources/bc_request_numericrange_max_added.yaml
new file mode 100644
index 000000000..f438d9bda
--- /dev/null
+++ b/core/src/test/resources/bc_request_numericrange_max_added.yaml
@@ -0,0 +1,56 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              maximum: 20
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_request_numericrange_max_decreased.yaml b/core/src/test/resources/bc_request_numericrange_max_decreased.yaml
new file mode 100644
index 000000000..be0dec2c6
--- /dev/null
+++ b/core/src/test/resources/bc_request_numericrange_max_decreased.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 19
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 19
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_request_numericrange_min_added.yaml b/core/src/test/resources/bc_request_numericrange_min_added.yaml
new file mode 100644
index 000000000..84a06bbca
--- /dev/null
+++ b/core/src/test/resources/bc_request_numericrange_min_added.yaml
@@ -0,0 +1,56 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_request_numericrange_min_increased.yaml b/core/src/test/resources/bc_request_numericrange_min_increased.yaml
new file mode 100644
index 000000000..87df1ba4a
--- /dev/null
+++ b/core/src/test/resources/bc_request_numericrange_min_increased.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 11
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 11
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_request_oneof_decreased.yaml b/core/src/test/resources/bc_request_oneof_decreased.yaml
new file mode 100644
index 000000000..82371aed6
--- /dev/null
+++ b/core/src/test/resources/bc_request_oneof_decreased.yaml
@@ -0,0 +1,47 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+    WidgetCreateResponse:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+    Doodad:
+      type: object
+      properties:
+        doodad_prop1:
+          type: string
+    Gadget:
+      type: object
+      properties:
+        gadget_prop1:
+          type: string
+    Gizmo:
+      type: object
+      properties:
+        gizmo_prop1:
+          type: string
diff --git a/core/src/test/resources/bc_request_param_allowemptyvalue_decreased.yaml b/core/src/test/resources/bc_request_param_allowemptyvalue_decreased.yaml
new file mode 100644
index 000000000..cf25dd898
--- /dev/null
+++ b/core/src/test/resources/bc_request_param_allowemptyvalue_decreased.yaml
@@ -0,0 +1,28 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          required: true
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          style: form
+          explode: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_param_base.yaml b/core/src/test/resources/bc_request_param_base.yaml
new file mode 100644
index 000000000..555015991
--- /dev/null
+++ b/core/src/test/resources/bc_request_param_base.yaml
@@ -0,0 +1,29 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          required: true
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          style: form
+          explode: true
+          allowEmptyValue: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_param_changed_but_compatible.yaml b/core/src/test/resources/bc_request_param_changed_but_compatible.yaml
new file mode 100644
index 000000000..281fd0514
--- /dev/null
+++ b/core/src/test/resources/bc_request_param_changed_but_compatible.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          allowEmptyValue: true
+          required: false
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          style: form
+          explode: true
+          allowEmptyValue: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_param_explode_changed.yaml b/core/src/test/resources/bc_request_param_explode_changed.yaml
new file mode 100644
index 000000000..3424c5fbe
--- /dev/null
+++ b/core/src/test/resources/bc_request_param_explode_changed.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          explode: true
+          required: true
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          style: form
+          explode: false
+          allowEmptyValue: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_param_required_increased.yaml b/core/src/test/resources/bc_request_param_required_increased.yaml
new file mode 100644
index 000000000..6af74a9bc
--- /dev/null
+++ b/core/src/test/resources/bc_request_param_required_increased.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          required: true
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          style: form
+          explode: true
+          allowEmptyValue: true
+          required: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_param_style_changed.yaml b/core/src/test/resources/bc_request_param_style_changed.yaml
new file mode 100644
index 000000000..ff8cb1dba
--- /dev/null
+++ b/core/src/test/resources/bc_request_param_style_changed.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          required: true
+          style: form
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          style: simple
+          explode: true
+          allowEmptyValue: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_params_base.yaml b/core/src/test/resources/bc_request_params_base.yaml
new file mode 100644
index 000000000..9d623821f
--- /dev/null
+++ b/core/src/test/resources/bc_request_params_base.yaml
@@ -0,0 +1,26 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          required: true
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_params_changed_but_compatible.yaml b/core/src/test/resources/bc_request_params_changed_but_compatible.yaml
new file mode 100644
index 000000000..62a26fbb6
--- /dev/null
+++ b/core/src/test/resources/bc_request_params_changed_but_compatible.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          required: true
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          schema:
+            type: string
+        - name: query-param-3
+          in: query
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_params_decreased.yaml b/core/src/test/resources/bc_request_params_decreased.yaml
new file mode 100644
index 000000000..2837bcc4d
--- /dev/null
+++ b/core/src/test/resources/bc_request_params_decreased.yaml
@@ -0,0 +1,22 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          required: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_params_required_increased.yaml b/core/src/test/resources/bc_request_params_required_increased.yaml
new file mode 100644
index 000000000..d1c2e16c3
--- /dev/null
+++ b/core/src/test/resources/bc_request_params_required_increased.yaml
@@ -0,0 +1,31 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: query-param-1
+          in: query
+          required: true
+          schema:
+            type: string
+        - name: query-param-2
+          in: query
+          schema:
+            type: string
+        - name: query-param-3
+          in: query
+          required: true
+          schema:
+            type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
diff --git a/core/src/test/resources/bc_request_readonly_increased.yaml b/core/src/test/resources/bc_request_readonly_increased.yaml
new file mode 100644
index 000000000..5de3149d1
--- /dev/null
+++ b/core/src/test/resources/bc_request_readonly_increased.yaml
@@ -0,0 +1,34 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                  readOnly: true
+                prop2:
+                  type: string
+                  readOnly: true
+              required:
+                - prop1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                    readOnly: true
diff --git a/core/src/test/resources/bc_request_readonly_required_decreased.yaml b/core/src/test/resources/bc_request_readonly_required_decreased.yaml
new file mode 100644
index 000000000..73f12cae5
--- /dev/null
+++ b/core/src/test/resources/bc_request_readonly_required_decreased.yaml
@@ -0,0 +1,32 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                prop2:
+                  type: string
+              required:
+                - prop1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                    readOnly: true
diff --git a/core/src/test/resources/bc_request_required_increased.yaml b/core/src/test/resources/bc_request_required_increased.yaml
new file mode 100644
index 000000000..cd9821ac0
--- /dev/null
+++ b/core/src/test/resources/bc_request_required_increased.yaml
@@ -0,0 +1,42 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                prop2:
+                  type: string
+                prop3:
+                  type: string
+              required:
+                - prop1
+                - prop2
+                - prop3
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                  prop2:
+                    type: string
+                  prop3:
+                    type: string
+                required:
+                  - prop1
+                  - prop2
diff --git a/core/src/test/resources/bc_request_schema_format_decreased.yaml b/core/src/test/resources/bc_request_schema_format_decreased.yaml
new file mode 100644
index 000000000..3a69caf83
--- /dev/null
+++ b/core/src/test/resources/bc_request_schema_format_decreased.yaml
@@ -0,0 +1,115 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int32
+        request_prop2:
+          type: integer
+          format: int32
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: integer
+          format: int32
+        response_prop2:
+          type: integer
+          format: int64
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_request_schema_format_increased.yaml b/core/src/test/resources/bc_request_schema_format_increased.yaml
new file mode 100644
index 000000000..6201e14c9
--- /dev/null
+++ b/core/src/test/resources/bc_request_schema_format_increased.yaml
@@ -0,0 +1,115 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int64
+        request_prop2:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: integer
+          format: int32
+        response_prop2:
+          type: integer
+          format: int64
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_request_schema_props_put_increased.yaml b/core/src/test/resources/bc_request_schema_props_put_increased.yaml
new file mode 100644
index 000000000..9ca619a47
--- /dev/null
+++ b/core/src/test/resources/bc_request_schema_props_put_increased.yaml
@@ -0,0 +1,117 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+                put_prop3:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int32
+        request_prop2:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: integer
+          format: int32
+        response_prop2:
+          type: integer
+          format: int64
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_required_base.yaml b/core/src/test/resources/bc_required_base.yaml
new file mode 100644
index 000000000..711cd20a0
--- /dev/null
+++ b/core/src/test/resources/bc_required_base.yaml
@@ -0,0 +1,41 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                prop2:
+                  type: string
+                prop3:
+                  type: string
+              required:
+                - prop1
+                - prop2
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                  prop2:
+                    type: string
+                  prop3:
+                    type: string
+                required:
+                  - prop1
+                  - prop2
diff --git a/core/src/test/resources/bc_required_changed_but_compatible.yaml b/core/src/test/resources/bc_required_changed_but_compatible.yaml
new file mode 100644
index 000000000..4e352896f
--- /dev/null
+++ b/core/src/test/resources/bc_required_changed_but_compatible.yaml
@@ -0,0 +1,41 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                prop2:
+                  type: string
+                prop3:
+                  type: string
+              required:
+                - prop1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                  prop2:
+                    type: string
+                  prop3:
+                    type: string
+                required:
+                  - prop1
+                  - prop2
+                  - prop3
diff --git a/core/src/test/resources/bc_response_apiresponse_base.yaml b/core/src/test/resources/bc_response_apiresponse_base.yaml
new file mode 100644
index 000000000..640a7dc1a
--- /dev/null
+++ b/core/src/test/resources/bc_response_apiresponse_base.yaml
@@ -0,0 +1,18 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+        '400':
+          description: Invalid status value
+  /widgets/index:
+    post:
+      operationId: indexWidgets
+      description: Regression test for https://github.com/OpenAPITools/openapi-diff/pull/206 (handle missing responses)
diff --git a/core/src/test/resources/bc_response_apiresponse_changed_but_compatible.yaml b/core/src/test/resources/bc_response_apiresponse_changed_but_compatible.yaml
new file mode 100644
index 000000000..6ad621348
--- /dev/null
+++ b/core/src/test/resources/bc_response_apiresponse_changed_but_compatible.yaml
@@ -0,0 +1,22 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+        '201':
+          description: OK
+        '400':
+          description: Invalid status value
+  /widgets/index:
+    post:
+      operationId: indexWidgets
+      responses:
+        '200':
+          description: successful operation
diff --git a/core/src/test/resources/bc_response_apiresponse_decreased.yaml b/core/src/test/resources/bc_response_apiresponse_decreased.yaml
new file mode 100644
index 000000000..6502cf0ce
--- /dev/null
+++ b/core/src/test/resources/bc_response_apiresponse_decreased.yaml
@@ -0,0 +1,16 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+  /widgets/index:
+    post:
+      operationId: indexWidgets
+      description: Regression test for https://github.com/OpenAPITools/openapi-diff/pull/206 (handle missing responses)
diff --git a/core/src/test/resources/bc_response_content_decreased.yaml b/core/src/test/resources/bc_response_content_decreased.yaml
new file mode 100644
index 000000000..2915db537
--- /dev/null
+++ b/core/src/test/resources/bc_response_content_decreased.yaml
@@ -0,0 +1,26 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+          application/text:
+            schema:
+              type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
diff --git a/core/src/test/resources/bc_response_enum_increased.yaml b/core/src/test/resources/bc_response_enum_increased.yaml
new file mode 100644
index 000000000..27a0d58d0
--- /dev/null
+++ b/core/src/test/resources/bc_response_enum_increased.yaml
@@ -0,0 +1,34 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      parameters:
+        - name: param-inline-enum
+          in: query
+          required: true
+          schema:
+            type: string
+            enum:
+              - param-inline-enum-val-1
+              - param-inline-enum-val-2
+            default: param-inline-enum-val-1
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  enum-prop:
+                    type: string
+                    enum:
+                      - enum-prop-val-1
+                      - enum-prop-val-2
+                      - enum-prop-val-3
+                    default: enum-prop-val-1
diff --git a/core/src/test/resources/bc_response_header_base.yaml b/core/src/test/resources/bc_response_header_base.yaml
new file mode 100644
index 000000000..17716ba06
--- /dev/null
+++ b/core/src/test/resources/bc_response_header_base.yaml
@@ -0,0 +1,21 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          headers:
+            X-Header-1:
+              required: true
+              schema:
+                type: integer
+                format: int32
+            X-Header-2:
+              schema:
+                type: integer
diff --git a/core/src/test/resources/bc_response_header_deprecated.yaml b/core/src/test/resources/bc_response_header_deprecated.yaml
new file mode 100644
index 000000000..0c60132bd
--- /dev/null
+++ b/core/src/test/resources/bc_response_header_deprecated.yaml
@@ -0,0 +1,22 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          headers:
+            X-Header-1:
+              required: true
+              schema:
+                type: integer
+                format: int32
+            X-Header-2:
+              deprecated: true
+              schema:
+                type: integer
diff --git a/core/src/test/resources/bc_response_header_explode.yaml b/core/src/test/resources/bc_response_header_explode.yaml
new file mode 100644
index 000000000..d48a726a7
--- /dev/null
+++ b/core/src/test/resources/bc_response_header_explode.yaml
@@ -0,0 +1,22 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          headers:
+            X-Header-1:
+              required: true
+              schema:
+                type: integer
+                format: int32
+            X-Header-2:
+              schema:
+                type: integer
+              explode: true
diff --git a/core/src/test/resources/bc_response_header_required_added.yaml b/core/src/test/resources/bc_response_header_required_added.yaml
new file mode 100644
index 000000000..83bceafe8
--- /dev/null
+++ b/core/src/test/resources/bc_response_header_required_added.yaml
@@ -0,0 +1,22 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          headers:
+            X-Header-1:
+              required: true
+              schema:
+                type: integer
+                format: int32
+            X-Header-2:
+              required: true
+              schema:
+                type: integer
diff --git a/core/src/test/resources/bc_response_header_required_deleted.yaml b/core/src/test/resources/bc_response_header_required_deleted.yaml
new file mode 100644
index 000000000..c227a3921
--- /dev/null
+++ b/core/src/test/resources/bc_response_header_required_deleted.yaml
@@ -0,0 +1,20 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          headers:
+            X-Header-1:
+              schema:
+                type: integer
+                format: int32
+            X-Header-2:
+              schema:
+                type: integer
diff --git a/core/src/test/resources/bc_response_headers_base.yaml b/core/src/test/resources/bc_response_headers_base.yaml
new file mode 100644
index 000000000..17716ba06
--- /dev/null
+++ b/core/src/test/resources/bc_response_headers_base.yaml
@@ -0,0 +1,21 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          headers:
+            X-Header-1:
+              required: true
+              schema:
+                type: integer
+                format: int32
+            X-Header-2:
+              schema:
+                type: integer
diff --git a/core/src/test/resources/bc_response_headers_increased.yaml b/core/src/test/resources/bc_response_headers_increased.yaml
new file mode 100644
index 000000000..837b3e222
--- /dev/null
+++ b/core/src/test/resources/bc_response_headers_increased.yaml
@@ -0,0 +1,24 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          headers:
+            X-Header-1:
+              required: true
+              schema:
+                type: integer
+                format: int32
+            X-Header-2:
+              schema:
+                type: integer
+            X-Header-3:
+              schema:
+                type: integer
diff --git a/core/src/test/resources/bc_response_headers_missing.yaml b/core/src/test/resources/bc_response_headers_missing.yaml
new file mode 100644
index 000000000..c5166c9c2
--- /dev/null
+++ b/core/src/test/resources/bc_response_headers_missing.yaml
@@ -0,0 +1,18 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          headers:
+            X-Header-1:
+              required: true
+              schema:
+                type: integer
+                format: int32
diff --git a/core/src/test/resources/bc_response_maxlength_increased.yaml b/core/src/test/resources/bc_response_maxlength_increased.yaml
new file mode 100644
index 000000000..40dd4309d
--- /dev/null
+++ b/core/src/test/resources/bc_response_maxlength_increased.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: string
+              maxLength: 16
+          application/xml:
+            schema:
+              type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+                maxLength: 20
+            application/xml:
+              schema:
+                type: string
+                maxLength: 20
diff --git a/core/src/test/resources/bc_response_numericrange_exclusive_max_deleted.yaml b/core/src/test/resources/bc_response_numericrange_exclusive_max_deleted.yaml
new file mode 100644
index 000000000..385b4759d
--- /dev/null
+++ b/core/src/test/resources/bc_response_numericrange_exclusive_max_deleted.yaml
@@ -0,0 +1,54 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
diff --git a/core/src/test/resources/bc_response_numericrange_exclusive_max_unset.yaml b/core/src/test/resources/bc_response_numericrange_exclusive_max_unset.yaml
new file mode 100644
index 000000000..e6c1448cd
--- /dev/null
+++ b/core/src/test/resources/bc_response_numericrange_exclusive_max_unset.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: false
diff --git a/core/src/test/resources/bc_response_numericrange_exclusive_min_deleted.yaml b/core/src/test/resources/bc_response_numericrange_exclusive_min_deleted.yaml
new file mode 100644
index 000000000..49881a7f4
--- /dev/null
+++ b/core/src/test/resources/bc_response_numericrange_exclusive_min_deleted.yaml
@@ -0,0 +1,54 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_response_numericrange_exclusive_min_unset.yaml b/core/src/test/resources/bc_response_numericrange_exclusive_min_unset.yaml
new file mode 100644
index 000000000..75bb758fa
--- /dev/null
+++ b/core/src/test/resources/bc_response_numericrange_exclusive_min_unset.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 20
+                exclusiveMinimum: false
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_response_numericrange_max_deleted.yaml b/core/src/test/resources/bc_response_numericrange_max_deleted.yaml
new file mode 100644
index 000000000..6edf439f2
--- /dev/null
+++ b/core/src/test/resources/bc_response_numericrange_max_deleted.yaml
@@ -0,0 +1,53 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_response_numericrange_max_increased.yaml b/core/src/test/resources/bc_response_numericrange_max_increased.yaml
new file mode 100644
index 000000000..e994bf88c
--- /dev/null
+++ b/core/src/test/resources/bc_response_numericrange_max_increased.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 21
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 10
+                maximum: 21
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_response_numericrange_min_decreased.yaml b/core/src/test/resources/bc_response_numericrange_min_decreased.yaml
new file mode 100644
index 000000000..2055a3247
--- /dev/null
+++ b/core/src/test/resources/bc_response_numericrange_min_decreased.yaml
@@ -0,0 +1,55 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                minimum: 9
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                minimum: 9
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_response_numericrange_min_deleted.yaml b/core/src/test/resources/bc_response_numericrange_min_deleted.yaml
new file mode 100644
index 000000000..087245c07
--- /dev/null
+++ b/core/src/test/resources/bc_response_numericrange_min_deleted.yaml
@@ -0,0 +1,53 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: integer
+              format: int32
+              exclusiveMinimum: false
+              exclusiveMaximum: false
+          application/text:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+          application/xml:
+            schema:
+              type: integer
+              format: int32
+              minimum: 10
+              maximum: 20
+              exclusiveMinimum: true
+              exclusiveMaximum: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: integer
+                format: int32
+                exclusiveMinimum: false
+                exclusiveMaximum: false
+            application/text:
+              schema:
+                type: integer
+                format: int32
+                maximum: 20
+            application/xml:
+              schema:
+                type: integer
+                format: int32
+                maximum: 20
+                exclusiveMinimum: true
+                exclusiveMaximum: true
diff --git a/core/src/test/resources/bc_response_oneof_increased.yaml b/core/src/test/resources/bc_response_oneof_increased.yaml
new file mode 100644
index 000000000..0d6636e0e
--- /dev/null
+++ b/core/src/test/resources/bc_response_oneof_increased.yaml
@@ -0,0 +1,49 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+    WidgetCreateResponse:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+        - $ref: '#/components/schemas/Gizmo'
+    Doodad:
+      type: object
+      properties:
+        doodad_prop1:
+          type: string
+    Gadget:
+      type: object
+      properties:
+        gadget_prop1:
+          type: string
+    Gizmo:
+      type: object
+      properties:
+        gizmo_prop1:
+          type: string
diff --git a/core/src/test/resources/bc_response_required_decreased.yaml b/core/src/test/resources/bc_response_required_decreased.yaml
new file mode 100644
index 000000000..e77d73da4
--- /dev/null
+++ b/core/src/test/resources/bc_response_required_decreased.yaml
@@ -0,0 +1,40 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                prop2:
+                  type: string
+                prop3:
+                  type: string
+              required:
+                - prop1
+                - prop2
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                  prop2:
+                    type: string
+                  prop3:
+                    type: string
+                required:
+                  - prop1
diff --git a/core/src/test/resources/bc_response_schema_format_decreased.yaml b/core/src/test/resources/bc_response_schema_format_decreased.yaml
new file mode 100644
index 000000000..66ad527df
--- /dev/null
+++ b/core/src/test/resources/bc_response_schema_format_decreased.yaml
@@ -0,0 +1,115 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int32
+        request_prop2:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: integer
+          format: int32
+        response_prop2:
+          type: integer
+          format: int32
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_response_schema_format_increased.yaml b/core/src/test/resources/bc_response_schema_format_increased.yaml
new file mode 100644
index 000000000..1ecc86fb6
--- /dev/null
+++ b/core/src/test/resources/bc_response_schema_format_increased.yaml
@@ -0,0 +1,115 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int32
+        request_prop2:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: integer
+          format: int64
+        response_prop2:
+          type: integer
+          format: int64
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_response_schema_props_required_decreased.yaml b/core/src/test/resources/bc_response_schema_props_required_decreased.yaml
new file mode 100644
index 000000000..cbd2c5a44
--- /dev/null
+++ b/core/src/test/resources/bc_response_schema_props_required_decreased.yaml
@@ -0,0 +1,112 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int32
+        request_prop2:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop2:
+          type: integer
+          format: int64
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_response_writeonly_increased.yaml b/core/src/test/resources/bc_response_writeonly_increased.yaml
new file mode 100644
index 000000000..a009b8dc6
--- /dev/null
+++ b/core/src/test/resources/bc_response_writeonly_increased.yaml
@@ -0,0 +1,34 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                  writeOnly: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                    writeOnly: true
+                  prop2:
+                    type: string
+                    writeOnly: true
+                required:
+                  - prop1
diff --git a/core/src/test/resources/bc_response_writeonly_required_decreased.yaml b/core/src/test/resources/bc_response_writeonly_required_decreased.yaml
new file mode 100644
index 000000000..74bf153ef
--- /dev/null
+++ b/core/src/test/resources/bc_response_writeonly_required_decreased.yaml
@@ -0,0 +1,32 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                  writeOnly: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                  prop2:
+                    type: string
+                required:
+                  - prop1
diff --git a/core/src/test/resources/bc_schema_base.yaml b/core/src/test/resources/bc_schema_base.yaml
new file mode 100644
index 000000000..28d8800d8
--- /dev/null
+++ b/core/src/test/resources/bc_schema_base.yaml
@@ -0,0 +1,115 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int32
+        request_prop2:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: integer
+          format: int32
+        response_prop2:
+          type: integer
+          format: int64
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_schema_changed_but_compatible.yaml b/core/src/test/resources/bc_schema_changed_but_compatible.yaml
new file mode 100644
index 000000000..e8a6e7e94
--- /dev/null
+++ b/core/src/test/resources/bc_schema_changed_but_compatible.yaml
@@ -0,0 +1,114 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop2:
+          type: integer
+          format: int64
+        request_prop3:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: integer
+          format: int32
+        response_prop3:
+          type: string
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+          deprecated: true
+        prop2:
+          type: integer
+          format: int32
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_schema_discriminator_changed.yaml b/core/src/test/resources/bc_schema_discriminator_changed.yaml
new file mode 100644
index 000000000..fd9569001
--- /dev/null
+++ b/core/src/test/resources/bc_schema_discriminator_changed.yaml
@@ -0,0 +1,115 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int32
+        request_prop2:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: integer
+          format: int32
+        response_prop2:
+          type: integer
+          format: int64
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: 'prop1'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_schema_type_changed.yaml b/core/src/test/resources/bc_schema_type_changed.yaml
new file mode 100644
index 000000000..946d16890
--- /dev/null
+++ b/core/src/test/resources/bc_schema_type_changed.yaml
@@ -0,0 +1,114 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/WidgetCreateRequest'
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/WidgetCreateResponse'
+    put:
+      operationId: widgetUpdate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                put_prop1:
+                  type: string
+                put_prop2:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+components:
+  schemas:
+    WidgetCreateRequest:
+      type: object
+      properties:
+        to_create:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        request_prop1:
+          type: integer
+          format: int32
+        request_prop2:
+          type: integer
+          format: int64
+      required:
+        - to_create
+        - request_prop1
+    WidgetCreateResponse:
+      type: object
+      properties:
+        created:
+          $ref: '#/components/schemas/Widget_Polymorphic'
+        response_prop1:
+          type: string
+        response_prop2:
+          type: integer
+          format: int64
+      required:
+        - created
+        - response_prop1
+    Widget_Polymorphic:
+      type: object
+      oneOf:
+        - $ref: '#/components/schemas/Doodad'
+        - $ref: '#/components/schemas/Gadget'
+      discriminator:
+        propertyName: '@type'
+    Widget:
+      type: object
+      properties:
+        '@type':
+          type: string
+        prop1:
+          type: string
+        prop2:
+          type: integer
+          format: int32
+          deprecated: true
+      required:
+        - '@type'
+        - prop1
+    Doodad:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            doodad_prop1:
+              type: string
+    Gadget:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gadget_prop1:
+              type: string
+    Gizmo:
+      type: object
+      allOf:
+        - $ref: '#/components/schemas/Widget'
+        - type: object
+          properties:
+            gizmo_prop1:
+              type: string
diff --git a/core/src/test/resources/bc_security_requirement_base.yaml b/core/src/test/resources/bc_security_requirement_base.yaml
new file mode 100644
index 000000000..477736519
--- /dev/null
+++ b/core/src/test/resources/bc_security_requirement_base.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - my-scheme-1: []
+          my-scheme-2: []
+components:
+  securitySchemes:
+    my-scheme-1:
+      type: http
+      scheme: basic
+    my-scheme-2:
+      type: http
+      scheme: basic
+    my-scheme-3:
+      type: http
+      scheme: basic
diff --git a/core/src/test/resources/bc_security_requirement_changed_but_compatible.yaml b/core/src/test/resources/bc_security_requirement_changed_but_compatible.yaml
new file mode 100644
index 000000000..9a58c327f
--- /dev/null
+++ b/core/src/test/resources/bc_security_requirement_changed_but_compatible.yaml
@@ -0,0 +1,29 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - my-scheme-1: []
+components:
+  securitySchemes:
+    my-scheme-1:
+      type: http
+      scheme: basic
+    my-scheme-2:
+      type: http
+      scheme: basic
+    my-scheme-3:
+      type: http
+      scheme: basic
diff --git a/core/src/test/resources/bc_security_requirement_schemes_increased.yaml b/core/src/test/resources/bc_security_requirement_schemes_increased.yaml
new file mode 100644
index 000000000..234aa7a29
--- /dev/null
+++ b/core/src/test/resources/bc_security_requirement_schemes_increased.yaml
@@ -0,0 +1,31 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - my-scheme-1: []
+          my-scheme-2: []
+          my-scheme-3: []
+components:
+  securitySchemes:
+    my-scheme-1:
+      type: http
+      scheme: basic
+    my-scheme-2:
+      type: http
+      scheme: basic
+    my-scheme-3:
+      type: http
+      scheme: basic
diff --git a/core/src/test/resources/bc_security_requirements_base.yaml b/core/src/test/resources/bc_security_requirements_base.yaml
new file mode 100644
index 000000000..9c4c04650
--- /dev/null
+++ b/core/src/test/resources/bc_security_requirements_base.yaml
@@ -0,0 +1,30 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - my-scheme-1: []
+        - my-scheme-2: []
+components:
+  securitySchemes:
+    my-scheme-1:
+      type: http
+      scheme: basic
+    my-scheme-2:
+      type: http
+      scheme: basic
+    my-scheme-3:
+      type: http
+      scheme: basic
diff --git a/core/src/test/resources/bc_security_requirements_changed_but_compatible.yaml b/core/src/test/resources/bc_security_requirements_changed_but_compatible.yaml
new file mode 100644
index 000000000..ba983bc36
--- /dev/null
+++ b/core/src/test/resources/bc_security_requirements_changed_but_compatible.yaml
@@ -0,0 +1,31 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - my-scheme-1: []
+        - my-scheme-2: []
+        - my-scheme-3: []
+components:
+  securitySchemes:
+    my-scheme-1:
+      type: http
+      scheme: basic
+    my-scheme-2:
+      type: http
+      scheme: basic
+    my-scheme-3:
+      type: http
+      scheme: basic
diff --git a/core/src/test/resources/bc_security_requirements_decreased.yaml b/core/src/test/resources/bc_security_requirements_decreased.yaml
new file mode 100644
index 000000000..9a58c327f
--- /dev/null
+++ b/core/src/test/resources/bc_security_requirements_decreased.yaml
@@ -0,0 +1,29 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - my-scheme-1: []
+components:
+  securitySchemes:
+    my-scheme-1:
+      type: http
+      scheme: basic
+    my-scheme-2:
+      type: http
+      scheme: basic
+    my-scheme-3:
+      type: http
+      scheme: basic
diff --git a/core/src/test/resources/bc_security_requirements_scheme_type_changed.yaml b/core/src/test/resources/bc_security_requirements_scheme_type_changed.yaml
new file mode 100644
index 000000000..d2e6f1a95
--- /dev/null
+++ b/core/src/test/resources/bc_security_requirements_scheme_type_changed.yaml
@@ -0,0 +1,31 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - my-scheme-1: []
+        - my-scheme-2: []
+components:
+  securitySchemes:
+    my-scheme-1:
+      type: apiKey
+      name: api_key
+      in: header
+    my-scheme-2:
+      type: http
+      scheme: basic
+    my-scheme-3:
+      type: http
+      scheme: basic
diff --git a/core/src/test/resources/bc_security_scheme_base.yaml b/core/src/test/resources/bc_security_scheme_base.yaml
new file mode 100644
index 000000000..00caad137
--- /dev/null
+++ b/core/src/test/resources/bc_security_scheme_base.yaml
@@ -0,0 +1,42 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - basic-scheme-1: []
+        - apikey-scheme-1: []
+        - openidconnect-scheme-1: []
+        - oauth2-scheme-1:
+            - "scope1"
+            - "scope2"
+components:
+  securitySchemes:
+    apikey-scheme-1:
+      type: apiKey
+      name: api_key
+      in: header
+    basic-scheme-1:
+      type: http
+    openidconnect-scheme-1:
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/api/openidconnect
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/dialog
+          scopes:
+            scope1: scope1 description
+            scope2: scope2 description
diff --git a/core/src/test/resources/bc_security_scheme_bearer_format_changed.yaml b/core/src/test/resources/bc_security_scheme_bearer_format_changed.yaml
new file mode 100644
index 000000000..bf7fcca56
--- /dev/null
+++ b/core/src/test/resources/bc_security_scheme_bearer_format_changed.yaml
@@ -0,0 +1,43 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - basic-scheme-1: []
+        - apikey-scheme-1: []
+        - openidconnect-scheme-1: []
+        - oauth2-scheme-1:
+            - "scope1"
+            - "scope2"
+components:
+  securitySchemes:
+    apikey-scheme-1:
+      type: apiKey
+      name: api_key
+      in: header
+    basic-scheme-1:
+      type: http
+      bearerFormat: myBearerFormat
+    openidconnect-scheme-1:
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/api/openidconnect
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/dialog
+          scopes:
+            scope1: scope1 description
+            scope2: scope2 description
diff --git a/core/src/test/resources/bc_security_scheme_changed_but_compatible.yaml b/core/src/test/resources/bc_security_scheme_changed_but_compatible.yaml
new file mode 100644
index 000000000..5cf1f26bf
--- /dev/null
+++ b/core/src/test/resources/bc_security_scheme_changed_but_compatible.yaml
@@ -0,0 +1,41 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - basic-scheme-1: []
+        - apikey-scheme-1: []
+        - openidconnect-scheme-1: []
+        - oauth2-scheme-1:
+            - "scope1"
+components:
+  securitySchemes:
+    apikey-scheme-1:
+      type: apiKey
+      name: api_key
+      in: header
+    basic-scheme-1:
+      type: http
+    openidconnect-scheme-1:
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/api/openidconnect
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/dialog
+          scopes:
+            scope1: scope1 description
+            scope2: scope2 description
diff --git a/core/src/test/resources/bc_security_scheme_in_changed.yaml b/core/src/test/resources/bc_security_scheme_in_changed.yaml
new file mode 100644
index 000000000..5d937c361
--- /dev/null
+++ b/core/src/test/resources/bc_security_scheme_in_changed.yaml
@@ -0,0 +1,42 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - basic-scheme-1: []
+        - apikey-scheme-1: []
+        - openidconnect-scheme-1: []
+        - oauth2-scheme-1:
+            - "scope1"
+            - "scope2"
+components:
+  securitySchemes:
+    apikey-scheme-1:
+      type: apiKey
+      name: api_key
+      in: query
+    basic-scheme-1:
+      type: http
+    openidconnect-scheme-1:
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/api/openidconnect
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/dialog
+          scopes:
+            scope1: scope1 description
+            scope2: scope2 description
diff --git a/core/src/test/resources/bc_security_scheme_open_id_connect_url_changed.yaml b/core/src/test/resources/bc_security_scheme_open_id_connect_url_changed.yaml
new file mode 100644
index 000000000..e981a945f
--- /dev/null
+++ b/core/src/test/resources/bc_security_scheme_open_id_connect_url_changed.yaml
@@ -0,0 +1,42 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - basic-scheme-1: []
+        - apikey-scheme-1: []
+        - openidconnect-scheme-1: []
+        - oauth2-scheme-1:
+            - "scope1"
+            - "scope2"
+components:
+  securitySchemes:
+    apikey-scheme-1:
+      type: apiKey
+      name: api_key
+      in: header
+    basic-scheme-1:
+      type: http
+    openidconnect-scheme-1:
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/api/openidconnect2
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/dialog
+          scopes:
+            scope1: scope1 description
+            scope2: scope2 description
diff --git a/core/src/test/resources/bc_security_scheme_scheme_changed.yaml b/core/src/test/resources/bc_security_scheme_scheme_changed.yaml
new file mode 100644
index 000000000..5b474049d
--- /dev/null
+++ b/core/src/test/resources/bc_security_scheme_scheme_changed.yaml
@@ -0,0 +1,43 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - basic-scheme-1: []
+        - apikey-scheme-1: []
+        - openidconnect-scheme-1: []
+        - oauth2-scheme-1:
+            - "scope1"
+            - "scope2"
+components:
+  securitySchemes:
+    apikey-scheme-1:
+      type: apiKey
+      name: api_key
+      in: header
+    basic-scheme-1:
+      type: http
+      scheme: Digest
+    openidconnect-scheme-1:
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/api/openidconnect
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/dialog
+          scopes:
+            scope1: scope1 description
+            scope2: scope2 description
diff --git a/core/src/test/resources/bc_security_scheme_scopes_increased.yaml b/core/src/test/resources/bc_security_scheme_scopes_increased.yaml
new file mode 100644
index 000000000..8cfe76833
--- /dev/null
+++ b/core/src/test/resources/bc_security_scheme_scopes_increased.yaml
@@ -0,0 +1,43 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - basic-scheme-1: []
+        - apikey-scheme-1: []
+        - openidconnect-scheme-1: []
+        - oauth2-scheme-1:
+            - "scope1"
+            - "scope2"
+            - "scope3"
+components:
+  securitySchemes:
+    apikey-scheme-1:
+      type: apiKey
+      name: api_key
+      in: header
+    basic-scheme-1:
+      type: http
+    openidconnect-scheme-1:
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/api/openidconnect
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/dialog
+          scopes:
+            scope1: scope1 description
+            scope2: scope2 description
diff --git a/core/src/test/resources/bc_security_scheme_type_changed.yaml b/core/src/test/resources/bc_security_scheme_type_changed.yaml
new file mode 100644
index 000000000..985a1a17b
--- /dev/null
+++ b/core/src/test/resources/bc_security_scheme_type_changed.yaml
@@ -0,0 +1,42 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    get:
+      operationId: listWidgets
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: string
+      security:
+        - basic-scheme-1: []
+        - apikey-scheme-1: []
+        - openidconnect-scheme-1: []
+        - oauth2-scheme-1:
+            - "scope1"
+            - "scope2"
+components:
+  securitySchemes:
+    apikey-scheme-1:
+      type: apiKey
+      name: api_key
+      in: header
+    basic-scheme-1:
+      type: apiKey
+    openidconnect-scheme-1:
+      type: openIdConnect
+      openIdConnectUrl: https://example.com/api/openidconnect
+    oauth2-scheme-1:
+      type: oauth2
+      flows:
+        implicit:
+          authorizationUrl: https://example.com/api/oauth/dialog
+          scopes:
+            scope1: scope1 description
+            scope2: scope2 description
diff --git a/core/src/test/resources/bc_writeonly_base.yaml b/core/src/test/resources/bc_writeonly_base.yaml
new file mode 100644
index 000000000..ad3c869db
--- /dev/null
+++ b/core/src/test/resources/bc_writeonly_base.yaml
@@ -0,0 +1,33 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+                  writeOnly: true
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                    writeOnly: true
+                  prop2:
+                    type: string
+                required:
+                  - prop1
diff --git a/core/src/test/resources/bc_writeonly_changed_but_compatible.yaml b/core/src/test/resources/bc_writeonly_changed_but_compatible.yaml
new file mode 100644
index 000000000..48857215b
--- /dev/null
+++ b/core/src/test/resources/bc_writeonly_changed_but_compatible.yaml
@@ -0,0 +1,32 @@
+openapi: 3.0.0
+info:
+  description: myDesc
+  title: myTitle
+  version: 1.0.0
+paths:
+  /widgets:
+    post:
+      operationId: widgetCreate
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                prop1:
+                  type: string
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  prop1:
+                    type: string
+                    writeOnly: true
+                  prop2:
+                    type: string
+                required:
+                  - prop1