diff --git a/dom/media/test/mochitest.ini b/dom/media/test/mochitest.ini
index 587578d95403..1d3851e30dcf 100644
--- a/dom/media/test/mochitest.ini
+++ b/dom/media/test/mochitest.ini
@@ -718,8 +718,6 @@ skip-if = toolkit == 'android' # bug 1149374
 [test_error_on_404.html]
 [test_fastSeek.html]
 [test_fastSeek-forwards.html]
-[test_gmp_playback.html]
-skip-if = (os != 'win' || os_version == '5.1') # Only gmp-clearkey on Windows Vista and later decodes
 [test_imagecapture.html]
 [test_info_leak.html]
 [test_invalid_reject.html]
diff --git a/dom/media/test/test_gmp_playback.html b/dom/media/test/test_gmp_playback.html
deleted file mode 100644
index b65a4203c751..000000000000
--- a/dom/media/test/test_gmp_playback.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <title>Test playback of media files that should play OK</title>
-  <script type="text/javascript" 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>
-</head>
-<body>
-<div id="log"></div>
-<pre id="test">
-<script class="testbody" type="text/javascript">
-
-SimpleTest.waitForExplicitFinish();
-
-function startTest() {
-  var v = document.createElement("video");
-  ok(v.canPlayType('video/mp4; codecs="avc1.64000d,mp4a.40.2"') != "",
-     "Should be able to play MP4/H.264/AAC via <video> using GMP");
-  v.src = "short.mp4";
-  v.addEventListener("ended", function(event) {
-    ok(true, "Reached end");
-    SimpleTest.finish();
-  });
-  document.body.appendChild(v);
-  v.play();
-}
-
-var testPrefs = [
-  ['media.gmp.decoder.aac', 1],  // gmp-clearkey
-  ['media.gmp.decoder.h264', 1], // gmp-clearkey
-  ['media.gmp.decoder.enabled', true]
-];
-
-SpecialPowers.pushPrefEnv({'set': testPrefs}, startTest);
-
-</script>
-</pre>
-</body>
-</html>
