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Our conformance test suites: how to run them, known bugs, and how to contribute. The tests are maintained in the web-platform-tests Git repository, mostly in the css
subdirectory.
Test suite and test case discussion takes place primarily in GitHub issues, with policy matters occasionally discussed on the public-test-infra mailing list. The #testing channel on irc.w3.org:6665 is also available for discussion, and is recommended for anything where a quick response is desirable. The public-css-testsuite mailing list exists for CSS-specific discussion, excluding any policy matters around the repository, primarily tooling maintained by the CSS WG (i.e., the CSS testsuites' build system and the CSS test harness).