$ pip install 'tox>=2.6' $ tox
And tests will be run against each Python interpreter you have installed.
Assuming you have already run the tox command, you can activate any of
created virtualenvs:
$ source .tox/py27/bin/activate (py27)$
or on Windows:
$ .tox/py27/Scripts/activate.bat (py27)$
nose is installed into tox created virtulanev (as it is present in
test_requirements.txt).
To run the tests:
(py27)$ nosetests
To run doctests:
(py27)$ python autorepr.py