diff --git a/test/unit/dom-bind-yield.html b/test/unit/dom-bind-yield.html
index e053b55f71..697a4d3a80 100644
--- a/test/unit/dom-bind-yield.html
+++ b/test/unit/dom-bind-yield.html
@@ -35,12 +35,14 @@
   <script>
     if (window.Polymer) {
       var now = Date.now() + 1000;
-      while (Date.now() < now) {}
+      while (Date.now() < now) {
+        Math.random();
+      }
     }
   </script>
 
   <script>
-    domBind.fired = function() {
+    window.domBind.fired = function() {
       this.didFire = true;
     }
   </script>
@@ -52,7 +54,7 @@
       suite('bind stamps after page fully loads (despite yielding)', function() {
 
         test('event handled', function() {
-          assert.isTrue(domBind.didFire);
+          assert.isTrue(window.domBind.didFire);
         });
 
       });