argparse==1.2.1
hypothesis==1.11.4
nose==1.3.7
pytz==2015.6
wsgiref==0.1.2

argparse==1.2.1
hypothesis[datetime]==1.11.4
nose==1.3.7
pytz==2015.6
wsgiref==0.1.2

Add [datetime] to hypothesis requirement.
Add [datetime] to hypothesis requirement.
