CONSOLE ERROR: line 58: Mixed Content: The page at 'https://web-platform.test:8444/mixed-content/xhr-request/no-opt-in/same-host-http/top-level/keep-scheme-redirect/blockable/no-opt-in-blocks.https.html' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://web-platform.test:8001/mixed-content/generic/expect.py?redirection=keep-scheme-redirect&action=purge&key=918a3b57-66a7-4869-98a0-73241f82305c&path=%2Fmixed-content&content_type=application/json'. This request has been blocked; the content must be served over HTTPS.
