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diff --git a/dom/media/mediasource/test/test_BufferedSeek.html b/dom/media/mediasource/test/test_BufferedSeek.html
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+++ b/dom/media/mediasource/test/test_BufferedSeek.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>MSE: seeking in buffered range</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="mediasource.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+var updateCount = 0;
+
+runWithMSE(function (ms, v) {
+  ms.addEventListener("sourceopen", function () {
+    var sb = ms.addSourceBuffer("video/webm");
+
+    fetchWithXHR("seek.webm", function (arrayBuffer) {
+      sb.appendBuffer(new Uint8Array(arrayBuffer));
+      sb.addEventListener("updateend", function () {
+        updateCount++;
+        /* Ensure that we endOfStream on the first update event only as endOfStream can
+           raise more if the duration of the last buffered range and the intial duration
+           differ. See bug 1065207 */
+        if (updateCount == 1) {
+          ms.endOfStream();
+        };
+      });
+    });
+
+    var target = 2;
+
+    v.addEventListener("loadedmetadata", function () {
+      if (v.currentTime != target &&
+          v.buffered.length &&
+          target >= v.buffered.start(0) &&
+          target < v.buffered.end(0)) {
+        v.currentTime = target;
+      }
+    });
+
+    var wasSeeking = false;
+
+    v.addEventListener("seeking", function () {
+      wasSeeking = true;
+      is(v.currentTime, target, "Video currentTime at target");
+    });
+
+    v.addEventListener("seeked", function () {
+      ok(wasSeeking, "Received expected seeking and seeked events");
+      is(v.currentTime, target, "Video currentTime at target");
+      SimpleTest.finish();
+    });
+  });
+});
+
+</script>
+</pre>
+</body>
+</html>