-r requirements.txt

coverage==4.5.3
coveralls==1.7.0
flake8==3.7.7
mock==2.0.0
pytest==4.3.1
pytest-cov==2.6.1

-r requirements.txt

coverage==4.5.3
coveralls==1.7.0
flake8==3.7.7
mock==2.0.0
pytest==4.4.0
pytest-cov==2.6.1

Update pytest from 4.3.1 to 4.4.0
Update pytest from 4.3.1 to 4.4.0