-r common.txt
coveralls==1.3.0
mock==2.0.0
pytest==3.5.0
pytest-cov==2.5.1
tox==2.9.1

-r common.txt
coveralls==1.3.0
mock==2.0.0
pytest==3.5.0
pytest-cov==2.5.1
tox==3.0.0

Update tox from 2.9.1 to 3.0.0
Update tox from 2.9.1 to 3.0.0