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chromium/third_party/blink/web_tests/http/tests/security/referrer-policy-rel-noreferrer.html 

<html>
<head>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.dumpChildFrames();
    testRunner.waitUntilDone();
}
</script>
</head>
<body>
<p>
    This test navigates a frame by clicking on a link with rel=noreferrer.
    It passes, if the referrer is empty, even though the referrer policy is
    set to always.
</p>
<iframe src="http://127.0.0.1:8000/security/resources/rel-noreferrer.html"></iframe>
</body>
</html>