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diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent-then-fragment.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent-then-fragment.html
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index 0000000000..d01ef4c77a
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+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/source/navigate-child-function-parent-then-fragment.html
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+<!doctype html>
+<meta charset=utf-8>
+<title>
+  Set location from a parent, then do a fragment navigation from within the
+  frame.
+</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<iframe></iframe>
+<script>
+  promise_test(async test => {
+    // Wait for the DOM to be ready before inserting an <iframe> into it.
+    await new Promise(resolve => { onload = resolve });
+    // Insert an <iframe> and wait for a dummy document to be loaded into it.
+    let iframe = document.createElement("iframe");
+    iframe.src = "support/dummy.html";
+    let iframe_loaded = new Promise(resolve => { iframe.onload = resolve });
+    document.body.appendChild(iframe);
+    await iframe_loaded;
+    // The referrer is the main frame's URL since it initiated the iframe
+    // creation.
+    assert_equals(iframe.contentDocument.referrer, document.URL);
+    // Do a fragment navigation from the frame, which will fire the
+    // 'hashchange' function.
+    let hash_changed = new Promise(resolve =>  {
+      iframe.contentWindow.onhashchange = resolve
+    });
+    let navigateScript = iframe.contentDocument.createElement("script");
+    navigateScript.innerHTML = "location.href = '#foo'";
+    iframe.contentDocument.body.appendChild(navigateScript);
+    await hash_changed;
+    // The referrer stays the same, even when the last navigation was
+    // initiated by the iframe (instead of the main frame document).
+    assert_equals(iframe.contentDocument.referrer, document.URL);
+  });
+</script>