http://bugs.winehq.org/show_bug.cgi?id=36152
--- Comment #3 from Hans Leidekker hans@meelstraat.net --- (In reply to Austin English from comment #2)
Retesting, it looks like I can reproduce it with make -j test, so it's a parallel test issue.
Right, that's because our test modules use the same installation directory under Program Files. Why do you run them in parallel?