3.7.0: flaky fails in pytest test suite

[kloczek]

On self testting pytest flaky fails with:

INTERNALERROR> Traceback (most recent call last):
INTERNALERROR>   ...
INTERNALERROR>   File "/usr/lib/python3.8/site-packages/flaky/flaky_pytest_plugin.py", line 139, in call_and_report
INTERNALERROR>     self._call_infos[item][when] = call
INTERNALERROR> KeyError: <Function test_hello>

https://github.com/pytest-dev/pytest/issues/8671#issuecomment-840923203