CONSOLE ERROR: Mixed Content: The page at 'https://web-platform.test:8444/mixed-content/audio-tag/http-csp/cross-origin-http/top-level/keep-scheme-redirect/optionally-blockable/opt-in-blocks.https.html' was loaded over HTTPS, but requested an insecure audio file 'http://www1.web-platform.test:8001/mixed-content/generic/expect.py?redirection=keep-scheme-redirect&action=purge&key=dbed22cb-2aa9-498f-a49e-e3ece134dd93&path=%2Fmixed-content&content_type=audio/wav'. This request has been blocked; the content must be served over HTTPS.
