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.
These details are provided for information only. No information here is legal advice and should not be used as such.