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

<html>
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<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.dumpChildFrames();
    testRunner.waitUntilDone();
}
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<p>
This test checks the referrer policy is obeyed along the redirect chain.  The
test passes if the referrer is http://127.0.0.1:8000
</p>
<iframe src="http://127.0.0.1:8000/security/resources/referrer-policy-redirect.html"></iframe>
</body>
</html>