-r requirements.txt
pytest==3.0.7
pytest-instafail==0.3.0
pytest-xdist==1.15.0
requests==2.13.0
selenium==3.4.0
websocket-client==0.40.0

-r requirements.txt
pytest==3.0.7
pytest-instafail==0.3.0
pytest-xdist==1.16.0
requests==2.13.0
selenium==3.4.0
websocket-client==0.40.0

Update pytest-xdist from 1.15.0 to 1.16.0
Update pytest-xdist from 1.15.0 to 1.16.0