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diff --git a/testing/web-platform/tests/referrer-policy/generic/subresource-test/iframe-messaging.html b/testing/web-platform/tests/referrer-policy/generic/subresource-test/iframe-messaging.html
new file mode 100644
index 0000000000..b8bdb0e5e0
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+++ b/testing/web-platform/tests/referrer-policy/generic/subresource-test/iframe-messaging.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<!-- TODO(kristijanburnik): Remove subres. duplication. Reuse a template. -->
+<html>
+  <head>
+    <title>Iframe messaging - cross-origin iframe request</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <!-- Common global functions for referrer-policy tests. -->
+    <script src="/common/security-features/resources/common.sub.js"></script>
+  </head>
+  <body>
+    <h1>Iframe messaging - cross-origin iframe request</h1>
+    <p>If you can read JSON encoded HTTP request headers of the iframe below,
+       the messaging works as expected.</p>
+
+    <pre id="received_message">Running...</pre>
+
+    <script>
+      promise_test(function() {
+        var urlPath = '/common/security-features/subresource/document.py';
+        var url = location.protocol + "//www1." + location.hostname + ":" + location.port +
+                  urlPath;
+        return requestViaIframe(url)
+          .then(function(message) {
+            var pre = document.getElementById('received_message')
+            var headers = message.headers;
+            pre.innerHTML = "";
+            pre.innerHTML += url + ":\n\n";
+            pre.innerHTML += JSON.stringify(headers, null, 2) + "\n\n"
+            assert_own_property(headers, "host")
+            assert_own_property(headers, "connection")
+          });
+      }, "Iframe is responding with HTTP headers");
+    </script>
+
+    <div id="log"></div>
+  </body>
+</html>