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diff --git a/testing/web-platform/tests/webmessaging/message-channels/001.html b/testing/web-platform/tests/webmessaging/message-channels/001.html
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+++ b/testing/web-platform/tests/webmessaging/message-channels/001.html
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+<!doctype html>
+<title>basic messagechannel test</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+async_test(function(t) {
+ var channel = new MessageChannel();
+ channel.port1.postMessage(1);
+ channel.port2.onmessage = t.step_func(
+ function(e) {
+ assert_equals(e.data, 1);
+ t.done();
+ });
+ channel.port2.start();
+});
+</script>