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diff --git a/dom/media/test/test_mediatrack_events.html b/dom/media/test/test_mediatrack_events.html
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+++ b/dom/media/test/test_mediatrack_events.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test events of media track interfaces</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="manifest.js"></script>
+  <script type="text/javascript" src="gUM_support.js"></script>
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+async function startTest() {
+  let steps = 0;
+  let element = document.createElement("video");
+  let stream;
+  try {
+    await setupGetUserMediaTestPrefs();
+    stream = await navigator.mediaDevices.getUserMedia({audio: true, video: true});
+  } catch (err) {
+    ok(false, 'Unexpected error fired with: ' + err);
+    SimpleTest.finish();
+    return;
+  }
+
+  function verifyEvent(e, type) {
+    is(e.type, type, "Event type should be " + type);
+    ok(e.isTrusted, "Event should be trusted.");
+    ok(!e.bubbles, "Event shouldn't bubble.");
+    ok(!e.cancelable, "Event shouldn't be cancelable.");
+  }
+
+  element.audioTracks.onaddtrack = function(e) {
+    ok(e instanceof TrackEvent, "Event fired from onaddtrack should be a TrackEvent");
+    ok(true, 'onaddtrack is expected to be called from audioTracks.');
+    verifyEvent(e, "addtrack");
+  };
+
+  element.audioTracks.onremovetrack = function(e) {
+    ok(e instanceof TrackEvent, "Event fired from onremovetrack should be a TrackEvent");
+    ok(true, 'onremovetrack is expected to be called from audioTracks.');
+    verifyEvent(e, "removetrack");
+  };
+
+  element.audioTracks.onchange = function(e) {
+    ok(e instanceof window.Event, "Event fired from onchange should be a simple event.");
+    ok(true, 'onchange is expected to be called from audioTracks.');
+    verifyEvent(e, "change");
+  };
+
+  element.videoTracks.onaddtrack = function(e) {
+    ok(e instanceof TrackEvent, "Event fired from onaddtrack should be a TrackEvent");
+    ok(true, 'onaddtrack is expected to be called from videoTracks.');
+    verifyEvent(e, "addtrack");
+  };
+
+  element.videoTracks.onremovetrack = function(e) {
+    ok(e instanceof TrackEvent, "Event fired from onremovetrack should be a TrackEvent");
+    ok(true, 'onremovetrack is expected to be called from videoTracks.');
+    verifyEvent(e, "removetrack");
+  };
+
+  element.videoTracks.onchange = function(e) {
+    ok(e instanceof window.Event, "Event fired from onchange should be a simple event.");
+    ok(true, 'onchange is expected to be called from videoTracks.');
+    verifyEvent(e, "change");
+  };
+
+  element.onended = function() {
+    ok(true, 'Event ended is expected to be fired on element.');
+    element.onended = null;
+    element.onplaying = null;
+    element.onpause = null;
+    //This helps to prevent these events from firing after SimpleTest.finish()
+    //on B2G ICS Emulator, but not sure they have been run at all, then
+    element.audioTracks.onremovetrack = null;
+    element.audioTracks.onaddtrack = null;
+    element.audioTracks.onchange = null;
+    element.videoTracks.onremovetrack = null;
+    element.videoTracks.onaddtrack = null;
+    element.videoTracks.onchange = null;
+    SimpleTest.finish();
+  }
+
+  function onpause() {
+    element.onpause = null;
+    if (element.ended) {
+      return;
+    }
+    if (steps == 1) {
+      element.audioTracks[0].enabled = false;
+      element.videoTracks[0].selected = false;
+      element.onplaying = onplaying;
+      element.play();
+      steps++;
+    }
+  }
+
+  function onplaying() {
+    element.onplaying = null;
+    if (element.ended) {
+      return;
+    }
+    if (steps == 1) {
+      element.onpause = onpause;
+      element.pause();
+    } else if (steps == 2) {
+      stream.getTracks().forEach(t => t.stop());
+    }
+  }
+
+  element.onplaying = onplaying;
+  element.srcObject = stream;
+
+  isnot(element.audioTracks, undefined,
+        'HTMLMediaElement::AudioTracks() property should be available.');
+  isnot(element.videoTracks, undefined,
+        'HTMLMediaElement::VideoTracks() property should be available.');
+
+  steps++;
+  await element.play();
+}
+
+SimpleTest.waitForExplicitFinish();
+SpecialPowers.pushPrefEnv(
+  {
+    "set": [
+      ["media.track.enabled", true]
+    ]
+  }, startTest);
+
+</script>
+</pre>
+</body>
+</html>