CONSOLE ERROR: line 121: Mixed Content: The page at 'https://web-platform.test:8444/mixed-content/link-css-tag/meta-csp/same-host-http/top-level/no-redirect/blockable/opt-in-blocks.https.html' was loaded over HTTPS, but requested an insecure stylesheet 'http://web-platform.test:8001/mixed-content/generic/expect.py?redirection=no-redirect&action=purge&key=dd90e0b6-e013-4760-87f2-0ae25ee8f814&path=%2Fmixed-content&content_type=text/css'. This request has been blocked; the content must be served over HTTPS.
