-r requirements.txt
pycodestyle==2.3.1
pytest==3.2.3
pytest-mock==1.6.3
pytest-cov==2.5.1
pytest-xdist==1.20.0
coveralls==1.2.0
httpretty==0.8.14
beautifulsoup4==4.6.0
freezegun==0.3.9

-r requirements.txt
pycodestyle==2.3.1
pytest==3.2.3
pytest-mock==1.6.3
pytest-cov==2.5.1
pytest-xdist==1.20.1
coveralls==1.2.0
httpretty==0.8.14
beautifulsoup4==4.6.0
freezegun==0.3.9

Update pytest-xdist from 1.20.0 to 1.20.1
Update pytest-xdist from 1.20.0 to 1.20.1