diff --git a/dom/animation/test/chrome/test_animate_xrays.html b/dom/animation/test/chrome/test_animate_xrays.html
index 991f2becd846..c164837540ae 100644
--- a/dom/animation/test/chrome/test_animate_xrays.html
+++ b/dom/animation/test/chrome/test_animate_xrays.html
@@ -19,7 +19,7 @@ var win = document.getElementById('iframe').contentWindow;
 async_test(function(t) {
   window.addEventListener('load', t.step_func(function() {
     var target = win.document.getElementById('target');
-    var anim = target.animate({ opacity: [ 0, 1 ] }, 2 * MS_PER_SEC);
+    var anim = target.animate({ opacity: [ 0, 1 ] }, 100 * MS_PER_SEC);
     // In the x-ray case, the frames object will be given an opaque wrapper
     // so it won't be possible to fetch any frames from it.
     assert_equals(anim.effect.getFrames().length, 0);
diff --git a/dom/animation/test/chrome/test_animation_observers.html b/dom/animation/test/chrome/test_animation_observers.html
index 69269cd626cb..2015af86252b 100644
--- a/dom/animation/test/chrome/test_animation_observers.html
+++ b/dom/animation/test/chrome/test_animation_observers.html
@@ -1525,27 +1525,27 @@ addAsyncAnimTest("tree_ordering", { observe: div, subtree: true }, function*() {
 [ div, pseudoTarget ].forEach(function(target) {
   addAsyncAnimTest("change_duration_and_currenttime",
                    { observe: div, subtree: true }, function*() {
-    var anim = target.animate({ opacity: [ 0, 1 ] }, 100 * MS_PER_SEC);
+    var anim = target.animate({ opacity: [ 0, 1 ] }, 200 * MS_PER_SEC);
 
     yield await_frame();
     assert_records([{ added: [anim], changed: [], removed: [] }],
                    "records after animation is added");
 
-    anim.effect.timing.duration = 10 * MS_PER_SEC;
+    anim.effect.timing.duration = 100 * MS_PER_SEC;
     yield await_frame();
     assert_records([{ added: [], changed: [anim], removed: [] }],
                    "records after duration is changed");
 
-    anim.effect.timing.duration = 10 * MS_PER_SEC;
+    anim.effect.timing.duration = 100 * MS_PER_SEC;
     yield await_frame();
     assert_records([], "records after assigning same value");
 
-    anim.currentTime = 50 * MS_PER_SEC;
+    anim.currentTime = 500 * MS_PER_SEC;
     yield await_frame();
     assert_records([{ added: [], changed: [], removed: [anim] }],
                    "records after animation end");
 
-    anim.effect.timing.duration = 100 * MS_PER_SEC;
+    anim.effect.timing.duration = 1000 * MS_PER_SEC;
     yield await_frame();
     assert_records([{ added: [anim], changed: [], removed: [] }],
                    "records after animation restarted");
@@ -1597,7 +1597,8 @@ addAsyncAnimTest("change_enddelay_and_currenttime",
 addAsyncAnimTest("change_enddelay_and_currenttime",
                  { observe: div, subtree: true }, function*() {
   var anim = div.animate({ opacity: [ 0, 1 ] },
-                         { duration: 100, endDelay: -100 });
+                         { duration: 100 * MS_PER_SEC,
+                           endDelay: -100 * MS_PER_SEC });
   yield await_frame();
   assert_records([], "records after animation is added");
 });
diff --git a/dom/animation/test/chrome/test_animation_properties.html b/dom/animation/test/chrome/test_animation_properties.html
index 56861d148d8e..1dae9cc03d2b 100644
--- a/dom/animation/test/chrome/test_animation_properties.html
+++ b/dom/animation/test/chrome/test_animation_properties.html
@@ -493,7 +493,7 @@ var gTests = [
 gTests.forEach(function(subtest) {
   test(function(t) {
     var div = addDiv(t);
-    var animation = div.animate(subtest.frames, 1 * MS_PER_SEC);
+    var animation = div.animate(subtest.frames, 100 * MS_PER_SEC);
     assert_properties_equal(animation.effect.getProperties(),
                             subtest.expected);
   }, subtest.desc);
diff --git a/dom/animation/test/chrome/test_running_on_compositor.html b/dom/animation/test/chrome/test_running_on_compositor.html
index 8dbe7f81711d..2892aea15ce6 100644
--- a/dom/animation/test/chrome/test_running_on_compositor.html
+++ b/dom/animation/test/chrome/test_running_on_compositor.html
@@ -287,14 +287,14 @@ promise_test(function(t) {
 
 promise_test(function(t) {
   var div = addDiv(t);
-  var animation = div.animate({ opacity: [ 0, 1 ] }, 100 * MS_PER_SEC);
+  var animation = div.animate({ opacity: [ 0, 1 ] }, 200 * MS_PER_SEC);
 
   return animation.ready.then(t.step_func(function() {
     assert_equals(animation.isRunningOnCompositor, omtaEnabled,
       'Animation reports that it is running on the compositor');
 
-    animation.currentTime = 50 * MS_PER_SEC;
-    animation.effect.timing.duration = 10 * MS_PER_SEC;
+    animation.currentTime = 150 * MS_PER_SEC;
+    animation.effect.timing.duration = 100 * MS_PER_SEC;
 
     assert_equals(animation.isRunningOnCompositor, false,
        'Animation reports that it is NOT running on the compositor'