-r requirements.txt
flake8==3.5.0
pytest==3.4.0
pytest-env==0.6.2
pytest-mock==1.7.0
pytest-cov==2.5.1
pytest-xdist==1.22.0
coveralls==1.2.0
freezegun==0.3.9
requests-mock==1.4.0
# optional requirements for jsonschema
strict-rfc3339==0.7
rfc3987==1.3.7

-r requirements.txt
flake8==3.5.0
pytest==3.4.0
pytest-env==0.6.2
pytest-mock==1.7.0
pytest-cov==2.5.1
pytest-xdist==1.22.1
coveralls==1.2.0
freezegun==0.3.9
requests-mock==1.4.0
# optional requirements for jsonschema
strict-rfc3339==0.7
rfc3987==1.3.7

Update pytest-xdist from 1.22.0 to 1.22.1
Update pytest-xdist from 1.22.0 to 1.22.1