-r common.txt
coveralls==1.5.1
mock==2.0.0
pytest==3.8.2
pytest-cov==2.6.0
tox==3.4.0

-r common.txt
coveralls==1.5.1
mock==2.0.0
pytest==3.8.2
pytest-cov==2.6.0
tox==3.5.1

Update tox from 3.4.0 to 3.5.1
Update tox from 3.4.0 to 3.5.1