-r requirements.txt
flake8==3.5.0
pytest==3.9.2
moto==1.3.6
pytest-env==0.6.2
pytest-mock==1.10.0
pytest-cov==2.6.0
pytest-xdist==1.23.2
coveralls==1.5.1
freezegun==0.3.11
requests-mock==1.5.2
# optional requirements for jsonschema
strict-rfc3339==0.7
rfc3987==1.3.8

-r requirements.txt
flake8==3.5.0
pytest==3.9.3
moto==1.3.6
pytest-env==0.6.2
pytest-mock==1.10.0
pytest-cov==2.6.0
pytest-xdist==1.23.2
coveralls==1.5.1
freezegun==0.3.11
requests-mock==1.5.2
# optional requirements for jsonschema
strict-rfc3339==0.7
rfc3987==1.3.8

Update pytest from 3.9.2 to 3.9.3
Update pytest from 3.9.2 to 3.9.3