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diff --git a/testing/web-platform/tests/soft-navigation-heuristics/popstate.tentative.html b/testing/web-platform/tests/soft-navigation-heuristics/popstate.tentative.html
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index 0000000000..60a5ff7229
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+++ b/testing/web-platform/tests/soft-navigation-heuristics/popstate.tentative.html
@@ -0,0 +1,47 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Detect simple soft navigation.</title>
+<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>
+<script src="resources/soft-navigation-helper.js"></script>
+</head>
+<body>
+  <main id=main>
+    <div>
+      <a id=link>Click me!</a>
+    </div>
+  </main>
+  <script>
+    // Push state twice, so that history.back() will trigger a popstate event,
+    // when the first push state is restored.
+    history.pushState({}, "", "foobar.html");
+    history.pushState({}, "", "another_one.html");
+
+    const link = document.getElementById("link");
+    link.addEventListener("click", () => history.back());
+    testSoftNavigation({
+      addContent: () => {
+        // Add the content to the main element
+        const main = document.getElementById("main");
+        main.removeChild(document.getElementsByTagName("div")[0]);
+        const div = document.createElement("div");
+        const text = document.createTextNode("Lorem ipsum");
+        div.appendChild(text);
+        div.style="font-size: 3em";
+        main.appendChild(div);
+      },
+      link: link,
+      testName: "A soft navigation that uses a same-document initiated popstate"
+        + " event is recognized by SoftNavigationHeuristics",
+      eventType: "popstate"});
+  </script>
+</body>
+</html>
+
+
+
+