Plugins

Many plugins are available for tox. These include, but are not limited to, the extensions found on the tox-dev org on GitHub.

Popular plugins

• tox-uv - Use uv for faster package installation.

• tox-gh-actions - Integrate tox with GitHub Actions for efficient CI workflows.

• tox-gh - Enhanced GitHub integration for running tox across multiple environments.

• tox-extra - Add sanity checks before/after tests (dirty repo detection, system dependencies).

• tox-recreate - Automatically recreate environments when dependency files change.

• tox-multipython - Interpreter discovery for multipython.

Plugins are automatically discovered from the Python environment that tox itself is installed in. This means that if tox is installed in an isolated environment (e.g. when installed using pipx or uv), the plugin(s) must be installed in the same environment. To ensure a plugin is always available, include it in requires, which causes tox to auto-provision a new isolated environment with both tox and the plugin(s) installed. For example:

TOML

requires = ["tox>=4", "tox-uv>=1"]

INI

[tox]
requires =
    tox>=4
    tox-uv>=1

Disabling plugins

Plugins can be disabled via the TOX_DISABLED_EXTERNAL_PLUGINS environment variable. Set it to a comma-separated list of plugin names:

env TOX_DISABLED_EXTERNAL_PLUGINS=tox-uv,tox-extra tox --version