py.test --version (return code: 0)
This is pytest version 3.1.3, imported from /usr/lib/python2.7/dist-packages/pytest.pyc
py.test -H (return code: 2)
usage: py.test [options] [file_or_dir] [file_or_dir] [...]
py.test: error: unrecognized arguments: -H
inifile: None
rootdir: /tmp/sandpit