When a WPT test case has console output, and that console output has a URL for a file served by the WPT test harness, the URL in WPE test output has the origin http://web-platform.test:8800 — whereas, in the test output for other platforms (and locally) the URL has the origin http://localhost:8800. See https://ews-build.s3-us-west-2.amazonaws.com/WPE-WK2-Tests-EWS/e9ef714b-19932-stress-mode/imported/w3c/web-platform-tests/html/semantics/document-metadata/the-link-element/stylesheet-bad-mime-type-pretty-diff.html
This is on purpose. The WPT tests are designed around this domain, using localhost on other ports is a bug to be fixed.
(In reply to Patrick Griffis from comment #1) > This is on purpose. The WPT tests are designed around this domain, using > localhost on other ports is a bug to be fixed. OK, thanks — given that, I’m going ahead and closing this as a WONTFIX
The bug for this on the Apple ports is here: https://bugs.webkit.org/show_bug.cgi?id=245294