I'm not entirely sure why these problems still occur on the testbot, because:
1. When I run these tests on my local machine, they don't fail at all even after multiple tries. (I even asked a bunch of people to run this on their machines and they didn't have any issues either) 2. http://test.winehq.org/data/tests/mfmediaengine:mfmediaengine.html doesn't show any problems either and the tests have been upstream for a while now.