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diff --git a/testing/web-platform/tests/websockets/interfaces/WebSocket/url/004.html b/testing/web-platform/tests/websockets/interfaces/WebSocket/url/004.html
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index 000000000..908e2cd9e
--- /dev/null
+++ b/testing/web-platform/tests/websockets/interfaces/WebSocket/url/004.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<title>WebSockets: 'URL'</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=../../../constants.js?pipe=sub></script>
+<meta name="variant" content="">
+<meta name="variant" content="?wss">
+<div id=log></div>
+<script>
+test(function() {
+  var ws = new WebSocket(SCHEME_DOMAIN_PORT+'/');
+  assert_equals(ws.URL, undefined);
+  assert_equals('URL' in ws, false);
+  assert_equals(WebSocket.prototype.URL, undefined);
+  assert_equals('URL' in WebSocket.prototype, false);
+});
+</script>