--- a/dom/animation/test/css-transitions/file_animation-pausing.html
+++ b/dom/animation/test/css-transitions/file_animation-pausing.html
@@ -32,17 +32,17 @@ async_test(function(t) {
   })).then(t.step_func(function() {
     previousAnimVal = getMarginLeft(cs);
     return waitForNextFrame();
   })).then(t.step_func(function() {
     assert_equals(getMarginLeft(cs), previousAnimVal,
                   'margin-left does not increase after calling pause()');
     previousAnimVal = getMarginLeft(cs);
     animation.play();
-    return animation.ready.then(waitForFrame);
+    return animation.ready.then(waitForNextFrame);
   })).then(t.step_func(function() {
     assert_greater_than(getMarginLeft(cs), previousAnimVal,
                         'margin-left increases after calling play()');
     t.done();
   }));
 }, 'pause() and play() a transition');
 
 done();