Tweak test filters for backbone and underscore.

test/backbone.html

@@ -45,6 +45,7 @@
 					}
 				};
 
+				// only skip `Backbone.Router` tests in IE < 8
 				if (!(document.attachEvent && (document.documentMode || 0) < 8)) {
 					delete skipped['Backbone.Router'];
 				}

test/saucelabs.js

@@ -60,7 +60,7 @@
       ['Windows 7', 'internet explorer', '8']
     ];
   }
-  // platforms for backbone tests
+  // platforms for Backbone tests
   if (isBackbone) {
     platforms = platforms.filter(function(platform) {
       var browser = platform[1],

test/underscore.html

@@ -97,21 +97,33 @@
 						'_.unescape': [
 							'"<a href=\\"http://moe.com\\">Curly & Moe&#039;s</a>"'
 						],
-						'uniqueId': [
+						'times': [
 							'Died on test #1'
 						],
-						'times': [
+						'uniqueId': [
 							'Died on test #1'
 						]
 					}
 				};
 
+				// only skip in non-Underscore builds
 				if (/\bunderscore\b/i.test(ui.buildPath)) {
 					delete skipped.Chaining;
 					delete skipped.Collections.where;
 					delete skipped.Utility['_.escape'];
 					delete skipped.Utility['_.unescape'];
 				}
+				// only skip in Sauce Labs
+				if (location.port != '8081') {
+					for (var key in skipped.Functions) {
+						if (/\b(debounce|throttl)/.test(key)) {
+							delete skipped.Functions[key];
+						}
+					}
+					delete skipped.Objects.isEqual;
+					delete skipped.Utility.times;
+					delete skipped.Utility.uniqueId;
+				}
 
 				QUnit.testStart(function(details) {
 					var test = QUnit.config.current,