--- a/dom/animation/test/css-animations/file_animations-dynamic-changes.html
+++ b/dom/animation/test/css-animations/file_animations-dynamic-changes.html
@@ -95,17 +95,17 @@ promise_test(function(t) {
 }, 'Only the startTimes of existing animations are preserved');
 
 promise_test(function(t) {
   var div = addDiv(t);
   div.style.animation = 'anim1 100s, anim1 100s';
   var secondAnimation = div.getAnimations()[1];
 
   // Wait before continuing so we can compare start times
-  return secondAnimation.ready.then(waitForFrame).then(function() {
+  return secondAnimation.ready.then(waitForNextFrame).then(function() {
     // Trim list of animations
     div.style.animationName = 'anim1';
     var animations = div.getAnimations();
     assert_equals(animations.length, 1, 'List of Animations was trimmed');
     assert_equals(animations[0], secondAnimation,
                   'Remaining Animation is the second one in the list');
     assert_equals(typeof(animations[0].startTime), 'number',
                   'Remaining Animation has resolved startTime');