Hi Colomban, Bootstrapping a new kind of testsuite is a lot of work (been there, did that), so I appreciate you try to get in-process a11y tests working. If you feel blocked, perhaps just have it Linux-only as a start to be able to cover shared code + Linux-specific code, and only later try to enable that for Windows/macOS? We have this approach for UI tests as well, and it seems the current state is better than not having UI tests at all. Regards, Miklos