--- a/dom/animation/test/chrome/test_restyles.html
+++ b/dom/animation/test/chrome/test_restyles.html
@@ -285,17 +285,17 @@ waitForAllPaints(function() {
      */
     if (isAndroid) {
       return;
     }
 
     var parentElement = addDiv(null,
       { style: 'overflow-y: scroll; height: 20px;' });
     var div = addDiv(null,
-      { style: 'animation: background-color 100s; position: relative; top: 100px;' });
+      { style: 'animation: background-color 100s; position: relative; top: 20px;' });
     parentElement.appendChild(div);
     var animation = div.getAnimations()[0];
 
     await animation.ready;
     var markers = await observeStyling(5);
 
     is(markers.length, 0,
        'Animations running on the main-thread for elements ' +
@@ -338,17 +338,17 @@ waitForAllPaints(function() {
 
     var grandParent = addDiv(null,
       { style: 'overflow-y: scroll; height: 20px;' });
     var parentElement = addDiv(null,
       { style: 'overflow-y: scroll; height: 100px;' });
     var div = addDiv(null,
       { style: 'animation: background-color 100s; ' +
                'position: relative; ' +
-               'top: 60px;' }); // This element is in-view in the parent, but
+               'top: 20px;' }); // This element is in-view in the parent, but
                                 // out of view in the grandparent.
     grandParent.appendChild(parentElement);
     parentElement.appendChild(div);
     var animation = div.getAnimations()[0];
 
     await animation.ready;
     var markers = await observeStyling(5);