On my system at least test_tools fails on test_processCmdline.

Adding a breakpoint just before the assertion causes the problem to go away, as does adding a sleep(0.1) to createProcess before returning the pid. Moving the call to tools.processCmdline before the breakpoint shows it returns an empty string unless a short delay is introduced.

I'm not sure if this problem is widespread enough to be important, but I'll add a trivial PR anyway.