Update pytest from 3.3.0 to 3.3.1
Update pytest from 3.3.0 to 3.3.1
wagnerand/amo-validator,mozilla/amo-validator,mozilla/amo-validator,mozilla/amo-validator,wagnerand/amo-validator,wagnerand/amo-validator,wagnerand/amo-validator,mozilla/amo-validator