diff --git a/test/asset/test-ui.js b/test/asset/test-ui.js
index d09f15719..5b9a72128 100644
--- a/test/asset/test-ui.js
+++ b/test/asset/test-ui.js
@@ -164,6 +164,9 @@
   // used to indicate testing a modularized build
   ui.isModularize = /\b(?:commonjs|(index|main)\.js|lodash-(?:amd|node)|modularize|npm)\b/.test([location.pathname, location.search, ui.buildPath]);
 
+  // used to indicate testing in Sauce Labs' automated test cloud
+  ui.isSauceLabs = location.port == '9001';
+
   // expose `ui`
   window.ui = ui;
 
diff --git a/test/backbone.html b/test/backbone.html
index 737e3cd50..10b59cc35 100644
--- a/test/backbone.html
+++ b/test/backbone.html
@@ -64,6 +64,12 @@
 					mixinPrereqs(_);
 					return;
 				}
+				// avoid reporting tests to Sauce Labs when errors occur
+				if (ui.isSauceLabs) {
+					window.onerror = function() {
+						QUnit.config.done.length = 0;
+					};
+				}
 				var reBasename = /[\w.-]+$/,
 				    basePath = ('//' + location.host + location.pathname.replace(reBasename, '')).replace(/\btest\/$/, ''),
 				    modulePath = ui.buildPath.replace(/\.js$/, ''),
@@ -127,4 +133,4 @@
 			}());
 		</script>
 	</body>
-</html>
\ No newline at end of file
+</html>
diff --git a/test/index.html b/test/index.html
index 9e44b13e3..1982ab7eb 100644
--- a/test/index.html
+++ b/test/index.html
@@ -185,6 +185,12 @@
 				if (!window.require) {
 					return;
 				}
+				// avoid reporting tests to Sauce Labs when errors occur
+				if (ui.isSauceLabs) {
+					window.onerror = function() {
+						QUnit.config.done.length = 0;
+					};
+				}
 				var reBasename = /[\w.-]+$/,
 				    basePath = ('//' + location.host + location.pathname.replace(reBasename, '')).replace(/\btest\/$/, ''),
 				    modulePath = ui.buildPath.replace(/\.js$/, ''),
@@ -303,4 +309,4 @@
 			};
 		</script>
 	</body>
-</html>
\ No newline at end of file
+</html>
diff --git a/test/underscore.html b/test/underscore.html
index 022049de0..ac31ff2cc 100644
--- a/test/underscore.html
+++ b/test/underscore.html
@@ -124,7 +124,7 @@
 			};
 
 			// only excuse in Sauce Labs (buggy Safari and timers)
-			if (location.port != '9001') {
+			if (!ui.isSauceLabs) {
 				delete QUnit.config.excused.Chaining['select/reject/sortBy'];
 				delete QUnit.config.excused.Chaining['select/reject/sortBy in functional style'];
 				delete QUnit.config.excused.Functions['throttle repeatedly with results'];
@@ -176,6 +176,12 @@
 				if (!window.require) {
 					return;
 				}
+				// avoid reporting tests to Sauce Labs when errors occur
+				if (ui.isSauceLabs) {
+					window.onerror = function() {
+						QUnit.config.done.length = 0;
+					};
+				}
 				var reBasename = /[\w.-]+$/,
 				    basePath = ('//' + location.host + location.pathname.replace(reBasename, '')).replace(/\btest\/$/, ''),
 				    modulePath = ui.buildPath.replace(/\.js$/, ''),
@@ -239,4 +245,4 @@
 			<li><%= data %></li>
 		</script>
 	</body>
-</html>
\ No newline at end of file
+</html>