diff --git a/spec/mocha.helpers.js b/spec/mocha.helpers.js
index e3ee9060..165e5131 100644
--- a/spec/mocha.helpers.js
+++ b/spec/mocha.helpers.js
@@ -21,7 +21,7 @@ const triggerResize = () => {
 const triggerUnload = () => {
   const unloadEvent = document.createEvent('Event');
 
-  unloadEvent.initEvent('beforeunload', true, true);
+  unloadEvent.initEvent('visibilitychange', true, true);
 
   global.window.unload = () => {
     global.window.dispatchEvent(unloadEvent);
diff --git a/src/utils/request-queue.js b/src/utils/request-queue.js
index 02146c9a..7158d2e0 100644
--- a/src/utils/request-queue.js
+++ b/src/utils/request-queue.js
@@ -20,8 +20,10 @@ class RequestQueue {
       : false; // Defaults to 'false'
 
     // Mark if page environment is unloading
-    helpers.addEventListener('beforeunload', () => {
-      this.pageUnloading = true;
+    helpers.addEventListener('visibilitychange', () => {
+      if (document.visibilityState === 'hidden') {
+        this.pageUnloading = true;
+      }
     });
 
     if (this.sendTrackingEvents) {
@@ -182,7 +184,7 @@ class RequestQueue {
       if (this.options && this.options.trackingSendDelay === 0) {
         this.sendEvents();
       } else {
-        // Defer sending of events to give beforeunload time to register (avoids race condition)
+        // Defer sending of events to give visibilitychange time to register (avoids race condition)
         setTimeout(this.sendEvents.bind(this), (this.options && this.options.trackingSendDelay) || 250);
       }
     }