-r requirements.txt

coverage==4.5.3
coveralls==1.7.0
flake8==3.7.7
mock==3.0.5
pytest==4.5.0
pytest-cov==2.6.1

-r requirements.txt

coverage==4.5.3
coveralls==1.7.0
flake8==3.7.7
mock==3.0.5
pytest==4.5.0
pytest-cov==2.7.1

Update pytest-cov from 2.6.1 to 2.7.1
Update pytest-cov from 2.6.1 to 2.7.1