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Note

This section of the documentation is currently out of date.

pip developers welcome your help to update this documentation. If you’re interested in helping out, please let us know in the tracking issue, or just submit a pull request and mention it in that tracking issue.

# Continuous Integration

## Supported interpreters

pip support a variety of Python interpreters:

- CPython 3.8

- CPython 3.9

- CPython 3.10

- CPython 3.11

- CPython 3.12

- CPython 3.13

- Latest PyPy3

on different operating systems:

- Linux

- Windows

- macOS

and on different architectures:

- x64

- x86

- arm64 (macOS only)

so 49 hypothetical interpreters.

## Checks

`pip` CI runs different kind of tests:

- lint (defined in `.pre-commit-config.yaml`)

- docs

- vendoring (is the `src/_internal/_vendor` directory cleanly vendored)

- unit tests (present in `tests/unit`)

- “integration” tests (mostly present in `tests/functional`)

- package (test the packaging steps)

Since lint, docs, vendoring and package tests only need to run on a pip developer/contributor machine, they only need to be tested on the x64 variant of the 3 different operating systems, and when an interpreter needs to be specified it’s ok to require the latest CPython interpreter.

So only unit tests and integration tests would need to be run with the different interpreters.

## Services

pip test suite and checks are distributed on GitHub Actions which provides free executors for open source packages.

## Current run tests

### Developer tasks

OS | docs | lint | vendoring | packaging
--- | --- | --- | --- | ---
Linux | GitHub | GitHub | GitHub | GitHub
Windows | GitHub | GitHub | GitHub | GitHub
macOS | GitHub | GitHub | GitHub | GitHub

### Actual testing

interpreter | unit | integration
Windows | x86 | CP3.8 |  |
CP3.9 |  |
CP3.10 |  |
CP3.11 |  |
CP3.12 |  |
CP3.13 |  |
PyPy3 |  |
x64 | CP3.8 | GitHub | GitHub
CP3.9 |  |
CP3.10 |  |
CP3.11 |  |
CP3.12 |  |
CP3.13 | GitHub | GitHub
PyPy3 |  |
Linux | x86 | CP3.8 |  |
CP3.9 |  |
CP3.10 |  |
CP3.11 |  |
CP3.12 |  |
CP3.13 |  |
PyPy3 |  |
x64 | CP3.8 | GitHub | GitHub
CP3.9 | GitHub | GitHub
CP3.10 | GitHub | GitHub
CP3.11 | GitHub | GitHub
CP3.12 | GitHub | GitHub
CP3.13 | GitHub | GitHub
PyPy3 |  |
macOS | arm64 | CP3.8 | GitHub | GitHub
CP3.9 | GitHub | GitHub
CP3.10 | GitHub | GitHub
CP3.11 | GitHub | GitHub
CP3.12 | GitHub | GitHub
CP3.13 | GitHub | GitHub
PyPy3 |  |
x64 | CP3.8 | GitHub | GitHub
CP3.9 | GitHub | GitHub
CP3.10 | GitHub | GitHub
CP3.11 | GitHub | GitHub
CP3.12 | GitHub | GitHub
CP3.13 | GitHub | GitHub
PyPy3 |  |