# tox > Automate Python testing across multiple Python versions. > Use tox.ini to configure environments and test command. > More information: . - Run tests on all test environments: `tox` - Create a `tox.ini` configuration: `tox-quickstart` - List the available environments: `tox --listenvs-all` - Run tests on a specific environment (e.g. Python 3.6): `tox -e {{py36}}` - Force the virtual environment to be recreated: `tox --recreate -e {{py27}}`