Update pytest from 3.0.7 to 3.1.0 (#2024)
Update pytest from 3.0.7 to 3.1.0 (#2024)


dstufft/warehouse,alex/warehouse,alex/warehouse,pypa/warehouse,dstufft/warehouse,alex/warehouse,dstufft/warehouse,alex/warehouse,pypa/warehouse,pypa/warehouse,alex/warehouse,dstufft/warehouse,pypa/warehouse