"python -m unittest strokes.py" doesn't exit for me

[d33tah]

Hi,

Consider the following repo:

https://github.com/d33tah/strokes/tree/7b52ba4b194b4127bd38e290e6bac742cfc06547

When I comment out test_gen_nihao_200, it works fine. Unfortunately if I don't, it reports success but doesn't exit (seems to loop forever). Leaving just test_gen_nihao_200 doesn't help either. Looks like mixing in async code and subprocesses does something unexpected. Could you help me sort out what?