# tox > tox is a generic virtualenv management and test command line tool - **URL**: https://www.freshcrate.ai/projects/tox - **Author**: pypi - **Category**: Frameworks - **Latest version**: `4.55.1` (2026-06-03) - **License**: Unknown - **Source**: https://github.com/tox-dev/tox - **Homepage**: https://pypi.org/project/tox/ - **Language**: Python - **GitHub**: 3,914 stars, 550 forks - **Registry**: pypi (`tox`) - **Tags**: `environments`, `isolated`, `pypi`, `testing`, `virtual` ## Description # tox [![PyPI](https://img.shields.io/pypi/v/tox)](https://pypi.org/project/tox/) [![Supported Python versions](https://img.shields.io/pypi/pyversions/tox.svg)](https://pypi.org/project/tox/) [![Downloads](https://static.pepy.tech/badge/tox/month)](https://pepy.tech/project/tox) [![Documentation status](https://readthedocs.org/projects/tox/badge/?version=latest)](https://tox.readthedocs.io/en/latest/?badge=latest) [![check](https://github.com/tox-dev/tox/actions/workflows/check.yaml/badge.svg)](https://github.com/tox-dev/tox/actions/workflows/check.yaml) `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 (alongside [pytest](https://docs.pytest.org/en/latest/) and [devpi](https://www.devpi.net)). tox is a generic virtual environment management and test command line tool you can use for: - checking your package builds and installs correctly under different environments (such as different Python implementations, versions or installation dependencies), - running your tests in each of the environments with the test tool of choice, - acting as a frontend to continuous integration servers, greatly reducing boilerplate and merging CI and shell-based testing. Please read our [user guide](https://tox.wiki/en/latest/tutorial/getting-started.html) for an example and more detailed introduction, or watch [this YouTube video](https://www.youtube.com/watch?v=SFqna5ilqig) that presents the problem space and how tox solves it. ## Recent releases | Version | Date | Urgency | Changes | | --- | --- | --- | --- | | `4.55.1` | 2026-06-03 | High | ## What's Changed * ๐Ÿ› fix(config): propagate overrides through config references by @tales-aparecida in https://github.com/tox-dev/tox/pull/3951 ## New Contributors * @tales-aparecida made their first contribution in https://github.com/tox-dev/tox/pull/3951 **Full Changelog**: https://github.com/tox-dev/tox/compare/4.55.0...4.55.1 | | `4.55.0` | 2026-05-28 | High | ## What's Changed * ๐Ÿ‘ท ci(schemastore): sync fork before pushing branch by @gaborbernat in https://github.com/tox-dev/tox/pull/3942 * feat: Also pass `TERMINFO` when in an interactive shell by @edgarrmondragon in https://github.com/tox-dev/tox/pull/3946 * ๐Ÿ› fix(pip): skip constrain_package_deps when constraints is set by @gaborbernat in https://github.com/tox-dev/tox/pull/3948 **Full Changelog**: https://g | | `4.54.0` | 2026-05-12 | High | ## What's Changed * ๐Ÿงช test(conftest): strip broken nspkg.pth files under py3.15 by @gaborbernat in https://github.com/tox-dev/tox/pull/3937 * โœจ feat(packaging): declare tox.pytest deps via a testing extra by @gaborbernat in https://github.com/tox-dev/tox/pull/3940 * ๐Ÿ› fix(schema): cover every replace form in the TOML schema by @gaborbernat in https://github.com/tox-dev/tox/pull/3941 **Full Changelog**: ht | | `4.53.1` | 2026-05-02 | High | ## What's Changed * ๐Ÿ› fix(security): harden user-facing logs and untrusted inputs by @gaborbernat in https://github.com/tox-dev/tox/pull/3924 * ๐Ÿ› fix(type): correct argparse override signatures for ty 0.0.33 by @gaborbernat in https://github.com/tox-dev/tox/pull/3932 * fix: allow deps arrays in TOML schema by @cyphercodes in https://github.com/tox-dev/tox/pull/3931 ## New Contributors * @cyphercodes made t | | `4.53.0` | 2026-04-21 | Low | Imported from PyPI (4.53.0) | | `4.52.1` | 2026-04-09 | Medium | ## What's Changed * use normalize_isa for architecture factor matching by @rahuldevikar in https://github.com/tox-dev/tox/pull/3919 * ๐Ÿ› fix(pip): invalidate install cache on resolution env var changes by @gaborbernat in https://github.com/tox-dev/tox/pull/3921 **Full Changelog**: https://github.com/tox-dev/tox/compare/4.52.0...4.52.1 | | `4.52.0` | 2026-03-30 | Medium | ## What's Changed * remove unsupported --remote flag from gh repo fork by @rahuldevikar in https://github.com/tox-dev/tox/pull/3908 * โœจ feat(config): support escaped dots in -x override keys by @gaborbernat in https://github.com/tox-dev/tox/pull/3910 * ๐Ÿ› fix(docs): auto-generate manpage from CLI parser by @gaborbernat in https://github.com/tox-dev/tox/pull/3911 * โœจ feat(runner): add PEP 723 inline script met | | `4.51.0` | 2026-03-27 | Medium | ## What's Changed * ๐Ÿ”’ ci(workflows): add zizmor security auditing by @gaborbernat in https://github.com/tox-dev/tox/pull/3896 * Add `base_python_file` config option by @rahuldevikar in https://github.com/tox-dev/tox/pull/3899 * prevent machine ISA from overriding explicit env factors by @rahuldevikar in https://github.com/tox-dev/tox/pull/3904 * ๐Ÿ› fix(config): fix handling of env_list in nested contexts by | | `4.50.3` | 2026-03-20 | Low | ## What's Changed * ๐Ÿ› fix(pkg): distinguish free-threaded Python in wheel build env by @gaborbernat in https://github.com/tox-dev/tox/pull/3891 **Full Changelog**: https://github.com/tox-dev/tox/compare/4.50.2...4.50.3 | | `4.50.2` | 2026-03-19 | Low | ## What's Changed * fix(sdist): include `docs/man/tox.1.rst` by @branchv in https://github.com/tox-dev/tox/pull/3890 ## New Contributors * @branchv made their first contribution in https://github.com/tox-dev/tox/pull/3890 **Full Changelog**: https://github.com/tox-dev/tox/compare/4.50.1...4.50.2 | ## Citation - HTML: https://www.freshcrate.ai/projects/tox - Markdown: https://www.freshcrate.ai/projects/tox.md - Dependencies JSON: https://www.freshcrate.ai/api/projects/tox/deps _Generated by freshcrate.ai. Indexes pypi releases for AI-agent ecosystem packages._