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diff --git a/dom/l10n/tests/mochitest/dom_localization/test_overlay.html b/dom/l10n/tests/mochitest/dom_localization/test_overlay.html
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index 0000000000..2c8c219bb2
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+++ b/dom/l10n/tests/mochitest/dom_localization/test_overlay.html
@@ -0,0 +1,60 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test DOMLocalization's DOMOverlay functionality</title>
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
+  <script type="application/javascript">
+  "use strict";
+  const l10nReg = new L10nRegistry();
+  const fs = [
+    { path: "/localization/en-US/mock.ftl", source: `
+title = <strong>Hello</strong> World
+title2 = This is <a data-l10n-name="link">a link</a>!
+` },
+  ];
+  const source = L10nFileSource.createMock("test", "app", ["en-US"], "/localization/{locale}", fs);
+  l10nReg.registerSources([source]);
+
+  window.onload = async function() {
+    SimpleTest.waitForExplicitFinish();
+
+    const domLoc = new DOMLocalization(
+      ["/mock.ftl"],
+      false,
+      l10nReg,
+      ["en-US"],
+    );
+
+    const p1 = document.querySelectorAll("p")[0];
+    const p2 = document.querySelectorAll("p")[1];
+    const a = p2.querySelector("a");
+    // We want to test that the event listener persists after
+    // translateFragment().
+    a.addEventListener("click", function(e) {
+      SimpleTest.finish();
+      // We cannot connect to non-local connections on automation, so prevent
+      // the navigation.
+      e.preventDefault();
+    });
+
+    await domLoc.translateFragment(document.body);
+
+
+    is(p1.querySelector("strong").textContent, "Hello");
+
+    is(p2.querySelector("a").getAttribute("href"), "http://www.mozilla.org");
+    is(p2.querySelector("a").textContent, "a link");
+
+    a.click();
+  };
+  </script>
+</head>
+<body>
+  <p data-l10n-id="title" />
+  <p data-l10n-id="title2">
+    <a href="http://www.mozilla.org" data-l10n-name="link"></a>
+  </p>
+</body>
+</html>