The tox team is proud to announce the 3.0.0 release! tox aims to automate and standardize testing in Python. It is part of a larger vision of easing the packaging, testing and release process of Python software. This is a major breaking release mainly because we're dropping support of Python versions 2.6 and 3.3. There are also some long awaited changes like making tox less chatty with one or several -q flags and added support for negated factor conditions. All in all we closed 79 issues and 83 pull requests. Details about the changes can be found in the CHANGELOG: https://pypi.org/project/tox/3.0.0/#changelog For the complete documentation, please visit https://tox.readthedocs.io/en/3.0.0 As usual, you can upgrade from pypi via: pip install --upgrade tox or - if you also want to get pre release versions: pip install -upgrade --pre tox Many thanks to all present and past contributors to tox. Have a look at https://github.com/tox-dev/tox/blob/master/CONTRIBUTORS to see who contributed. Happy toxing, the tox-dev team