-r requirements.txt
pycodestyle==2.3.1
pytest==3.1.3
pytest-mock==1.6.0
pytest-cov==2.3.1
pytest-xdist==1.14
coveralls==1.1
moto==0.4.25
httpretty==0.8.14
beautifulsoup4==4.5.1
freezegun==0.3.7

-r requirements.txt
pycodestyle==2.3.1
pytest==3.1.3
pytest-mock==1.6.0
pytest-cov==2.5.1
pytest-xdist==1.14
coveralls==1.1
moto==0.4.25
httpretty==0.8.14
beautifulsoup4==4.5.1
freezegun==0.3.7

Update pytest-cov from 2.3.1 to 2.5.1
Update pytest-cov from 2.3.1 to 2.5.1