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diff --git a/testing/web-platform/tests/web-animations/interfaces/Animation/playState.html b/testing/web-platform/tests/web-animations/interfaces/Animation/playState.html
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+++ b/testing/web-platform/tests/web-animations/interfaces/Animation/playState.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Animation.playState</title>
+<link rel="help" href="https://w3c.github.io/web-animations/#dom-animation-playstate">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../../testcommon.js"></script>
+<body>
+<div id="log"></div>
+<script>
+'use strict';
+
+promise_test(function(t) {
+  var div = createDiv(t);
+  var animation = div.animate({}, 100 * MS_PER_SEC);
+
+  assert_equals(animation.playState, 'pending');
+  return animation.ready.then(function() {
+    assert_equals(animation.playState, 'running');
+  });
+}, 'Animation.playState reports \'pending\'->\'running\' when initially ' +
+   'played');
+
+promise_test(function(t) {
+  var div = createDiv(t);
+  var animation = div.animate({}, 100 * MS_PER_SEC);
+  animation.pause();
+
+  assert_equals(animation.playState, 'pending');
+  return animation.ready.then(function() {
+    assert_equals(animation.playState, 'paused');
+  });
+}, 'Animation.playState reports \'pending\'->\'paused\' when pausing');
+
+test(function(t) {
+  var div = createDiv(t);
+  var animation = div.animate({}, 100 * MS_PER_SEC);
+  animation.cancel();
+  assert_equals(animation.playState, 'idle');
+}, 'Animation.playState is \'idle\' when canceled.');
+
+test(function(t) {
+  var div = createDiv(t);
+  var animation = div.animate({}, 100 * MS_PER_SEC);
+  animation.cancel();
+  animation.currentTime = 50 * MS_PER_SEC;
+  assert_equals(animation.playState, 'paused',
+                'After seeking an idle animation, it is effectively paused');
+}, 'Animation.playState is \'paused\' after cancelling an animation, ' +
+   'seeking it makes it paused');
+
+</script>
+</body>