-r requirements.txt
flake8==3.5.0
pytest==3.6.4
pytest-cov==2.5.1
pytest-runner==4.2
tox==3.1.2

-r requirements.txt
flake8==3.5.0
pytest==3.7.0
pytest-cov==2.5.1
pytest-runner==4.2
tox==3.1.2

Update pytest from 3.6.4 to 3.7.0
Update pytest from 3.6.4 to 3.7.0