@etaash.mathamsetty That's what I was going to try next and indeed that fixes the regression and works better. I've pushed this for now and I'll unmark as draft because I think this is an improvement (and it no longer regresses other ntdll tests). I credited you as `Suggested by`, I hope that's ok! I've also added another commit to stop some ntdll:exception test cases from breaking really badly on a non-wow64 (pure 64bit) build of Wine. They still fail but this makes them not hang/crash/cause a stream of failures. That's mostly just to make local testing with a 64bit build easier when other tests are the target. I'm going to try to implement a more robust fix using the "deferred signal" approach next, but perhaps this is worth merging in the interim since it's less intrusive and it fixes a real regression? -- https://gitlab.winehq.org/wine/wine/-/merge_requests/10232#note_133206