diff --git a/lib/assert.js b/lib/assert.js
index f3d8c093b..802786e04 100644
--- a/lib/assert.js
+++ b/lib/assert.js
@@ -36,11 +36,11 @@ x.fail = function (msg) {
 	test(false, create(false, false, 'fail', msg, x.fail));
 };
 
-x.ok = function (val, msg) {
+x.ok = x.truthy = function (val, msg) {
 	test(val, create(val, true, '==', msg, x.ok));
 };
 
-x.notOk = function (val, msg) {
+x.notOk = x.falsy = function (val, msg) {
 	test(!val, create(val, false, '==', msg, x.notOk));
 };
 
diff --git a/readme.md b/readme.md
index 8fcefdbe5..4729276e2 100644
--- a/readme.md
+++ b/readme.md
@@ -740,11 +740,11 @@ Failing assertion.
 
 ### `.ok(value, [message])`
 
-Assert that `value` is truthy.
+Assert that `value` is truthy. (Alias: `.truthy`)
 
 ### `.notOk(value, [message])`
 
-Assert that `value` is falsy.
+Assert that `value` is falsy. (Alias: `.falsy`)
 
 ### `.true(value, [message])`
 
diff --git a/test/assert.js b/test/assert.js
index c02b46d36..c51713e12 100644
--- a/test/assert.js
+++ b/test/assert.js
@@ -30,6 +30,8 @@ test('.ok()', function (t) {
 		assert.ok(true);
 	});
 
+	t.same(assert.ok, assert.truthy);
+
 	t.end();
 });
 
@@ -44,6 +46,8 @@ test('.notOk()', function (t) {
 		assert.notOk(false);
 	});
 
+	t.same(assert.notOk, assert.falsy);
+
 	t.end();
 });