referrer-policy-https-no-referrer.html

<html>
<head>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.dumpChildFrames();
    testRunner.waitUntilDone();
}
</script>
</head>
<body>
<p>
This test checks the default referrer policy when navigating from a secure URL
to an insecure URL. The test passes if the printed referrer is empty.
</p>
<iframe src="https://127.0.0.1:8443/security/resources/referrer-policy-start.html?no-referrer"></iframe>
</body>
</html>

chromium/third_party/blink/web_tests/http/tests/security/referrer-policy-https-no-referrer.html