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diff --git a/testing/web-platform/tests/fetch/api/request/multi-globals/url-parsing.html b/testing/web-platform/tests/fetch/api/request/multi-globals/url-parsing.html
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+++ b/testing/web-platform/tests/fetch/api/request/multi-globals/url-parsing.html
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+<!DOCTYPE html>
+<title>Request constructor URL parsing, with multiple globals in play</title>
+<link rel="help" href="https://fetch.spec.whatwg.org/#dom-request">
+<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<!-- This is the entry global -->
+
+<iframe src="incumbent/incumbent.html"></iframe>
+
+<script>
+'use strict';
+
+const loadPromise = new Promise(resolve => {
+    window.addEventListener("load", () => resolve());
+});
+
+promise_test(() => {
+    return loadPromise.then(() => {
+        const req = document.querySelector('iframe').contentWindow.createRequest("url");
+
+        assert_equals(req.url, new URL("current/success/url", location.href).href);
+    });
+}, "should parse the URL relative to the current settings object");
+
+</script>