Build failing on travis for py3.4

[tbhartman]

See build 157624311:

Works for 2.7 and 3.6

pytest
============================= test session starts ==============================
platform linux -- Python 3.4.6, pytest-3.0.7, py-1.4.33, pluggy-0.4.0
rootdir: /home/travis/build/tbhartman/doorbell, inifile: pytest.ini
plugins: cov-2.6.0
collected 9 items / 1 errors 
==================================== ERRORS ====================================
__________________________ ERROR collecting setup.py ___________________________
/opt/python/3.4.6/lib/python3.4/distutils/core.py:134: in setup
    ok = dist.parse_command_line()
../../../virtualenv/python3.4.6/lib/python3.4/site-packages/setuptools/dist.py:500: in parse_command_line
    result = _Distribution.parse_command_line(self)
/opt/python/3.4.6/lib/python3.4/distutils/dist.py:489: in parse_command_line
    raise DistutilsArgError("no commands supplied")
E   distutils.errors.DistutilsArgError: no commands supplied
During handling of the above exception, another exception occurred:
setup.py:45: in <module>
    'Programming Language :: Python :: 3.7',
../../../virtualenv/python3.4.6/lib/python3.4/site-packages/setuptools/__init__.py:140: in setup
    return distutils.core.setup(**attrs)
/opt/python/3.4.6/lib/python3.4/distutils/core.py:136: in setup
    raise SystemExit(gen_usage(dist.script_name) + "\nerror: %s" % msg)
E   SystemExit: usage: pytest [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
E      or: pytest --help [cmd1 cmd2 ...]
E      or: pytest --help-commands
E      or: pytest cmd --help
E   
E   error: no commands supplied
!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!
=========================== 1 error in 0.37 seconds ============================