tox-uv
Integration of uv with tox (meta package with bundled uv).
Decision gist · record as of 2026-08-14
Yes. tox-uv is production-stable (Development Status 5), actively maintained, has zero known vulnerabilities, and low install friction. Install it if you want faster test environments and are comfortable accepting uv's behavior (including any bugs) as a trade-off for speed. Use tox-uv-bare in containerized environments to avoid redundant binary downloads.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires tox to be installed; tox-uv acts as a plugin that modifies tox's behavior rather than functioning standalone.
- Low friction: pure Python wheel with only two runtime dependencies (tox-uv-bare and uv).
- Actively maintained with a release 24 days ago and 351 repository stars.
License · maintenance · safety
MIT (permissive) — MIT license permits unrestricted use, modification, and distribution in both open-source and commercial projects.
last release 2026-07-21 (24 days) · last repo commit 2026-08-10 · 351 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 8,171,513 downloads/mo, #1,658 on PyPI
Alternatives
Verify before relying
pip install tox-uv
uv tool install tox --with tox-uv
tox r -e py312- Whether uv's known bugs or incompatibilities with specific package types affect your test suite beyond tox-uv's control.
- Performance gains relative to virtualenv+pip for your specific dependency graph and test count.
What it is and what it does
tox-uv is a tox plugin that swaps out virtualenv and pip with uv, the Rust-based Python package manager, for all test environment operations. It works as a drop-in replacement: install it alongside tox, and subsequent tox runs automatically use uv for environment creation and dependency resolution. The plugin supports multiple tox environment types (standard, lock-file-based, PEP 723 inline scripts, PEP 517 packaging, and external builders) and integrates with uv.lock files for reproducible test environments.
The package comes in two distributions: tox-uv (recommended, includes a bundled uv binary for immediate use) and tox-uv-bare (plugin only, for containerized setups where uv is already installed). You inherit both uv's speed advantages and any of its limitations or bugs. Discovery of the uv binary follows a priority chain: TOX_UV_PATH environment variable, bundled binary, or system PATH. The plugin is actively maintained, supports Python 3.10 through 3.14, and carries no known security vulnerabilities.
Use it for
- Speed up CI/CD pipelines by replacing pip with uv's faster dependency resolution in tox test matrices.
- Use uv.lock files in tox to ensure reproducible test environments across developers and CI runs.
- Run PEP 723 inline script metadata through tox with uv as the backend for dependency isolation.
- Containerize test environments with tox-uv-bare to avoid bundling duplicate uv binaries in Docker images.
- Test projects that rely on uv-specific features like tool.uv.sources without leaving the tox workflow.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
tox-uv is production-stable (Development Status 5), actively maintained, has zero known vulnerabilities, and low install friction. Install it if you want faster test environments and are comfortable accepting uv's behavior (including any bugs) as a trade-off for speed. Use tox-uv-bare in containerized environments to avoid redundant binary downloads.
Install
tox-uv on PyPI
Before you install
Low friction: pure Python wheel with only two runtime dependencies (tox-uv-bare and uv). Actively maintained with a release 24 days ago and 351 repository stars.
Requires tox to be installed; tox-uv acts as a plugin that modifies tox's behavior rather than functioning standalone.
License in practice
MIT license permits unrestricted use, modification, and distribution in both open-source and commercial projects.
Quickstart
pip install tox-uv
uv tool install tox --with tox-uv
tox r -e py312Verify before relying
- Whether uv's known bugs or incompatibilities with specific package types affect your test suite beyond tox-uv's control.
- Performance gains relative to virtualenv+pip for your specific dependency graph and test count.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagestox-uv-bareuv |
| Maintenance | Actively maintained 24 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 8,171,513 / month, #1,658 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: InternetTopic :: Software Development :: LibrariesTopic :: System |
Evidence: tox_uv-1.36.0-py3-none-any.whl
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See also tox-uv-bare · nox-uv · tox · tox-docker · tox-gh-actions · tox-gh · virtualenv · mozilla-repo-urls · ansible-dev-environment · hadolint-coatl