-r common.txt
coveralls==1.5.0
mock==2.0.0
pytest==3.8.0
pytest-cov==2.6.0
tox==3.2.1

-r common.txt
coveralls==1.5.0
mock==2.0.0
pytest==3.8.0
pytest-cov==2.6.0
tox==3.4.0

Update tox from 3.2.1 to 3.4.0
Update tox from 3.2.1 to 3.4.0