Log Message:
py-test: updated to 3.9.2

pytest 3.9.2:

Bug Fixes
* Improve error message when a recursive dependency between fixtures is detected.
* Fix logging messages not shown in hooks pytest_sessionstart() and \ 
pytest_sessionfinish().
* Fix unescaped XML raw objects in JUnit report for skipped tests
* Python 2: safely format warning message about passing unicode strings to \ 
warnings.warn, which may cause surprising MemoryError exception when monkey \ 
patching warnings.warn itself.
* Improve error message when it is not possible to determine a function’s \ 
signature.
* Pin setuptools>=40.0 to support py_modules in setup.cfg
* Restore the tmpdir behaviour of symlinking the current test run.
* Fix filename reported by warnings.warn when using recwarn under python2.