CONSOLE WARNING: Mixed Content: The page at 'https://web-platform.test:8444/mixed-content/audio-tag/no-opt-in/cross-origin-http/top-level/no-redirect/optionally-blockable/no-opt-in-allows.https.html' was loaded over HTTPS, but requested an insecure audio file 'http://www1.web-platform.test:8001/mixed-content/generic/expect.py?redirection=no-redirect&action=purge&key=213e52a7-4bb3-43f8-99d2-9fa27bea8dda&path=%2Fmixed-content&content_type=audio/wav'. This content should also be served over HTTPS.
