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tox — Automate Python testing across multiple Python versions. Use tox.ini to configure environments and t

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandmultiplepythonautomatecliacrosstoxtesting

Problem

How to use the tox command: Automate Python testing across multiple Python versions. Use tox.ini to configure environments and test command. More information: <https://github.com/tox-dev/tox>.

Solution

tox — Automate Python testing across multiple Python versions. Use tox.ini to configure environments and test command. More information: <https://github.com/tox-dev/tox>.

Run tests on all test environments:

tox

Create a tox.ini configuration:

tox-quickstart

List the available environments:

tox {{[-a|--listenvs-all]}}

Run tests on a specific environment (e.g. Python 3.6):

tox -e {{py36}}

Force the virtual environment to be recreated:

tox {{[-r|--recreate]}} -e {{py27}}

Code Snippets

Run tests on all test environments

tox

Create a `tox.ini` configuration

tox-quickstart

List the available environments

tox {{[-a|--listenvs-all]}}

Run tests on a specific environment (e.g. Python 3.6)

tox -e {{py36}}

Force the virtual environment to be recreated

tox {{[-r|--recreate]}} -e {{py27}}

Context

tldr-pages: common/tox

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