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diff --git a/testing/web-platform/tests/mathml/relations/html5-tree/href-click-3.html b/testing/web-platform/tests/mathml/relations/html5-tree/href-click-3.html
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index 0000000000..f6f1ada6d7
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+++ b/testing/web-platform/tests/mathml/relations/html5-tree/href-click-3.html
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+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>href click</title>
+<link rel="help" href="https://w3c.github.io/mathml-core/#attributes-common-to-html-and-mathml-elements">
+<link rel="help" href="https://w3c.github.io/mathml-core/#dom-and-javascript">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+</head>
+<body>
+  <p>To test manually, click the blue rectangle.</p>
+  <p>
+    <math>
+      <mspace width="50px" height="10px" style="background: gray"></mspace>
+      <mspace id="target" href="javascript:handler()" width="50px" height="10px" style="background: blue"></mspace>
+      <mspace width="50px" height="10px" style="background: gray"></mspace>
+    </math>
+  </p>
+  <a id="badTarget" href="javascript:badHandler()">DON'T CLICK ME</a>
+  <script>
+    var t = async_test("Click element with href");
+    function handler() { t.done(); }
+    function badHandler() {
+      t.step(() => { assert_unreached("Bad handler executed"); });
+      t.done();
+    }
+    test_driver.click(document.getElementById("target")).then(() => {
+      return test_driver.click(document.getElementById("badTarget"));
+    }).catch(() => {
+      t.step(() => { assert_unreached("Click failed"); });
+      t.done();
+    });
+  </script>
+</body>
+</html>