Hi,
While running your changed tests, I think I found new failures. Being a bot and all I'm not very good at pattern recognition, so I might be wrong, but could you please double-check?
Full results can be found at: https://testbot.winehq.org/JobDetails.pl?Key=50240
Your paranoid android.
=== debian9 (64 bit WoW report) ===
mfplat: mfplat.c:2417: Test failed: Unexpected refcount 1. Unhandled exception: page fault on read access to 0x00000011 in 64-bit code (0x00007ff3e033a155).
Report errors: mfplat:mfplat crashed (c0000005)