-r common.txt
coveralls==1.5.1
mock==2.0.0
pytest==3.9.3
pytest-cov==2.6.0
tox==3.5.1

-r common.txt
coveralls==1.5.1
mock==2.0.0
pytest==3.9.3
pytest-cov==2.6.0
tox==3.5.3

Update tox from 3.5.1 to 3.5.3
Update tox from 3.5.1 to 3.5.3