Adjust sauce underscore/backbone settings.

test/backbone.html

@@ -50,8 +50,9 @@
 						return;
 					}
 					if (skippedAsserts === true) {
-						test.expected = 0;
+						test.async = false;
 						test.callback = _.noop;
+						test.expected = 0;
 						return;
 					}
 					test.finish = _.wrap(test.finish, function(func) {

test/saucelabs.js

@@ -29,6 +29,7 @@
   }());
 
   var runnerQuery = url.parse(runnerPathname, true).query,
+      isBackbone = /\bbackbone\b/i.test(runnerPathname),
       isMobile = /\bmobile\b/i.test(runnerQuery.build),
       isModern = /\bmodern\b/i.test(runnerQuery.build);
 
@@ -59,7 +60,20 @@
       ['Windows 7', 'internet explorer', '8']
     ];
   }
-  // test mobile & modern browsers
+  // platforms for backbone tests
+  if (isBackbone) {
+    platforms = platforms.filter(function(platform) {
+      var browser = platform[1],
+          version = +platform[2];
+
+      switch (browser) {
+        case 'firefox': return version >= 4;
+        case 'internet explorer': return version >= 8;
+      }
+      return true
+    });
+  }
+  // platforms for mobile and modern builds
   if (isMobile || isModern) {
     platforms = platforms.filter(function(platform) {
       var browser = platform[1],

test/underscore.html

@@ -62,7 +62,8 @@
 						],
 						'bindAll': [
 							'throws an error for bindAll with no functions named'
-						]
+						],
+						'throttle triggers trailing call when invoked repeatedly': true
 					},
 					'Objects': {
 						'keys': [
@@ -99,8 +100,9 @@
 						return;
 					}
 					if (skippedAsserts === true) {
-						test.expected = 0;
+						test.async = false;
 						test.callback = _.noop;
+						test.expected = 0;
 						return;
 					}
 					test.finish = _.wrap(test.finish, function(func) {