Tox as is a generic virtualenv management and test command line tool you can
use for:

* checking your package installs correctly with different Python
  versions and interpreters

* running your tests in each of the environments, configuring
  your test tool of choice

* acting as a frontend to Continuous Integration servers, greatly
  reducing boilerplate and merging CI and shell-based testing.

WWW: https://tox.readthedocs.org/