tox 3.21.4-1ubuntu1 (amd64 binary) in ubuntu lunar

 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.