-r requirements.txt
flake8==3.5.0
pytest==3.6.3
pytest-cov==2.5.1
pytest-runner==4.2
tox==3.0.0

-r requirements.txt
flake8==3.5.0
pytest==3.6.4
pytest-cov==2.5.1
pytest-runner==4.2
tox==3.0.0

Update pytest from 3.6.3 to 3.6.4
Update pytest from 3.6.3 to 3.6.4