-r requirements.txt
flake8==3.5.0
mccabe==0.6.1
py==1.5.2
pycodestyle==2.3.1
pyflakes==1.6.0
pytest==3.3.2
pytest-cov==2.5.1

-r requirements.txt
flake8==3.5.0
mccabe==0.6.1
py==1.5.2
pycodestyle==2.3.1
pyflakes==1.6.0
pytest==3.4.0
pytest-cov==2.5.1

Update pytest from 3.3.2 to 3.4.0
Update pytest from 3.3.2 to 3.4.0