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diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/same-document-nav-cross-document-traversal.html b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/same-document-nav-cross-document-traversal.html
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+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/overlapping-navigations-and-traversals/same-document-nav-cross-document-traversal.html
@@ -0,0 +1,70 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Traversal after a same-document navigations</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<!--
+  These tests are kind of silly since it's hard to imagine any other result:
+  same-document navigations are always synchronous so of course back() won't
+  cancel them.
+
+  Nevertheless they're nice as a basis from which to write corresponding app
+  history tests, where the consequences aren't as obvious.
+-->
+
+<body>
+<script type="module">
+import { createIframe, waitForLoad, delay } from "./resources/helpers.mjs";
+
+promise_test(async t => {
+  const iframe = await createIframe(t);
+
+  // Setup
+  // Extra delay()s are necessary because if we navigate "inside" the load
+  // handler (i.e. in a promise reaction for the load handler) then it will
+  // be a replace navigation.
+  iframe.contentWindow.location.search = "?1";
+  await waitForLoad(iframe);
+  await delay(t, 0);
+  iframe.contentWindow.location.search = "?2";
+  await waitForLoad(iframe);
+  await delay(t, 0);
+
+  iframe.contentWindow.location.hash = "#3";
+  iframe.contentWindow.history.go(-2);
+
+  assert_equals(iframe.contentWindow.location.search, "?2", "must not go back synchronously (search)");
+  assert_equals(iframe.contentWindow.location.hash, "#3", "must not go back synchronously (hash)");
+
+  await waitForLoad(iframe);
+  assert_equals(iframe.contentWindow.location.search, "?1", "must go back eventually (search)");
+  assert_equals(iframe.contentWindow.location.hash, "", "must go back eventually (hash)");
+}, "fragment navigation then go(-2)");
+
+promise_test(async t => {
+  const iframe = await createIframe(t);
+
+  // Setup
+  // Extra delay()s are necessary because if we navigate "inside" the load
+  // handler (i.e. in a promise reaction for the load handler) then it will
+  // be a replace navigation.
+  iframe.contentWindow.location.search = "?1";
+  await waitForLoad(iframe);
+  await delay(t, 0);
+  iframe.contentWindow.location.search = "?2";
+  await waitForLoad(iframe);
+  await delay(t, 0);
+
+  iframe.contentWindow.history.pushState(null, "", "/3");
+  iframe.contentWindow.history.go(-2);
+
+  assert_equals(iframe.contentWindow.location.search, "", "must not go back synchronously (search)");
+  assert_equals(iframe.contentWindow.location.pathname, "/3", "must not go back synchronously (pathname)");
+
+  await waitForLoad(iframe);
+  assert_equals(iframe.contentWindow.location.search, "?1", "must go back eventually (search)");
+  assert_equals(iframe.contentWindow.location.pathname, "/common/blank.html", "must go back eventually (pathname)");
+
+}, "pushState then go(-2)");
+</script>