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diff --git a/dom/messagechannel/tests/test_messageChannel_unshipped.html b/dom/messagechannel/tests/test_messageChannel_unshipped.html
new file mode 100644
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+++ b/dom/messagechannel/tests/test_messageChannel_unshipped.html
@@ -0,0 +1,123 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - unshipped message port queue</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  function test_orderedMessages() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    var b = new MessageChannel();
+    ok(b, "MessageChannel created");
+
+    var expectedNumber = 1;
+    function testEvent(number, id) {
+      is(expectedNumber, number, "This is the right number!");
+      ok(!((expectedNumber - id) % 4), "From the right port: " + expectedNumber + " " + id);
+      expectedNumber++;
+
+      if (expectedNumber >100) {
+        runTests();
+      }
+    }
+
+    a.port1.onmessage = function(evt) {
+      testEvent(evt.data, 2);
+    };
+
+    a.port2.onmessage = function(evt) {
+      testEvent(evt.data, 1);
+    };
+
+    b.port1.onmessage = function(evt) {
+      testEvent(evt.data, 4);
+    };
+
+    b.port2.onmessage = function(evt) {
+      testEvent(evt.data, 3);
+    };
+
+    for (var i = 0; i < 100;) {
+      a.port1.postMessage(++i);
+      a.port2.postMessage(++i);
+      b.port1.postMessage(++i);
+      b.port2.postMessage(++i);
+    }
+  }
+
+  function test_unstarted() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    var b = new MessageChannel();
+    ok(b, "MessageChannel created");
+
+    var expectedNumber = 1;
+    function testEvent(number, id) {
+      is(expectedNumber, number, "This is the right number!");
+      ok(!((expectedNumber - id) % 3), "From the right port: " + expectedNumber + " " + id);
+      expectedNumber++;
+
+      // 102 because it's the first multiple of 3.
+      if (expectedNumber > 102) {
+        runTests();
+      }
+    }
+
+    a.port1.onmessage = function(evt) {
+      testEvent(evt.data, 2);
+    };
+
+    a.port2.onmessage = function(evt) {
+      testEvent(evt.data, 1);
+    };
+
+    b.port1.addEventListener("message", function() {
+      ok(false, "shouldn't be called");
+    });
+
+    b.port2.onmessage = function(evt) {
+      testEvent(evt.data, 3);
+    };
+
+    for (var i = 0; i < 100;) {
+      a.port1.postMessage(++i);
+      a.port2.postMessage(++i);
+      b.port1.postMessage(++i);
+      b.port2.postMessage(1000);
+    }
+  }
+
+  var tests = [
+    test_orderedMessages,
+    test_unstarted
+  ];
+
+  function runTests() {
+    if (!tests.length) {
+      SimpleTest.finish();
+      return;
+    }
+
+    var test = tests.shift();
+    test();
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  runTests();
+  </script>
+</body>
+</html>