F                                                                        [100%]
=================================== FAILURES ===================================
_____________________________ TestThing.test_fail ______________________________

self = <f.TestThing object at 0x7f5dc0afe5d0>

>   def test_fail(self): assert False
                         ^^^^^^^^^^^^
E   assert False

f.py:2: AssertionError
=========================== short test summary info ============================
FAILED f.py::TestThing::test_fail - assert False
1 failed in 0.00s