build: replace outdated *-latest runners with specific ones

This change unlocks the current pipelines because it will allow use of newer version of 3.9 which is required by tox. In general is better not to use `-latest` runners because they are very often outdated versions, causing problems. As github does not update the name of the runners very often, it is easier to use specific ones. This also prevents surprises when github is changing the runner versions as they do this gradually and -latest ones might point to different runners in different jobs. Related: tox-dev/tox#3565 Reference: https://github.com/actions/runner-images

Author: ssbarnea

.github/workflows/test.yml

@@ -95,55 +95,55 @@ jobs:
  # Use separate jobs for different unittest flavors (twisted, asynctest) to ensure proper coverage.
  - name: "windows-py39-unittest-asynctest"
  python: "3.9"
- os: windows-latest
+ os: windows-2025
  tox_env: "py39-asynctest"
  use_coverage: true
 
  - name: "windows-py39-unittest-twisted24"
  python: "3.9"
- os: windows-latest
+ os: windows-2025
  tox_env: "py39-twisted24"
  use_coverage: true
 
  - name: "windows-py39-unittest-twisted25"
  python: "3.9"
- os: windows-latest
+ os: windows-2025
  tox_env: "py39-twisted25"
  use_coverage: true
 
  - name: "windows-py39-pluggy"
  python: "3.9"
- os: windows-latest
+ os: windows-2025
  tox_env: "py39-pluggymain-pylib-xdist"
 
  - name: "windows-py39-xdist"
  python: "3.9"
- os: windows-latest
+ os: windows-2025
  tox_env: "py39-xdist"
 
  - name: "windows-py310"
  python: "3.10"
- os: windows-latest
+ os: windows-2025
  tox_env: "py310-xdist"
 
  - name: "windows-py311"
  python: "3.11"
- os: windows-latest
+ os: windows-2025
  tox_env: "py311"
 
  - name: "windows-py312"
  python: "3.12"
- os: windows-latest
+ os: windows-2025
  tox_env: "py312"
 
  - name: "windows-py313"
  python: "3.13"
- os: windows-latest
+ os: windows-2025
  tox_env: "py313"
 
  - name: "windows-py314"
  python: "3.14"
- os: windows-latest
+ os: windows-2025
  tox_env: "py314"
 
  # Use separate jobs for different unittest flavors (twisted, asynctest) to ensure proper coverage.
@@ -223,28 +223,28 @@ jobs:
 
  - name: "macos-py39"
  python: "3.9"
- os: macos-latest
+ os: macos-15
  tox_env: "py39-xdist"
  use_coverage: true
 
  - name: "macos-py310"
  python: "3.10"
- os: macos-latest
+ os: macos-15
  tox_env: "py310-xdist"
 
  - name: "macos-py312"
  python: "3.12"
- os: macos-latest
+ os: macos-15
  tox_env: "py312-xdist"
 
  - name: "macos-py313"
  python: "3.13"
- os: macos-latest
+ os: macos-15
  tox_env: "py313-xdist"
 
  - name: "macos-py314"
  python: "3.14"
- os: macos-latest
+ os: macos-15
  tox_env: "py314-xdist"
 
  - name: "plugins"
@@ -291,17 +291,22 @@ jobs:
  name: Packages
  path: dist
 
- - name: Set up Python ${{ matrix.python }}
- uses: actions/setup-python@v5
+ # - name: Set up Python ${{ matrix.python }}
+ # uses: actions/setup-python@v5
+ # with:
+ # python-version: ${{ matrix.python }}
+ # check-latest: true
+ # allow-prereleases: true
+
+ - name: Install the latest version of uv
+ uses: astral-sh/setup-uv@v6
  with:
- python-version: ${{ matrix.python }}
- check-latest: true
- allow-prereleases: true
+ version: ${{ matrix.python }}
 
  - name: Install dependencies
  run: |
  python -m pip install --upgrade pip
- pip install tox coverage
+ pip install tox tox-uv coverage
 
  - name: Test without coverage
  if: "! matrix.use_coverage"

.python-version

@@ -0,0 +1,5 @@
+3.9.17
+3.10.13
+3.11.13
+3.12.11
+3.13.5

testing/plugins_integration/requirements.txt

@@ -1,5 +1,6 @@
 anyio[trio]==4.9.0
 django==5.2.1
+pip>=24.0.0
 pytest-asyncio==1.1.0
 pytest-bdd==8.1.0
 pytest-cov==6.2.1

tox.ini

@@ -1,6 +1,8 @@
 [tox]
 isolated_build = True
-minversion = 3.20.0
+minversion = 4.28.1
+requires =
+ tox-uv
 distshare = {homedir}/.tox/distshare
 envlist =
  linting
@@ -159,10 +161,7 @@ setenv =
 description =
  run reverse dependency testing against pytest plugins under `{basepython}`
 # use latest versions of all plugins, including pre-releases
-pip_pre=true
-# use latest pip to get new dependency resolver (#7783)
 download=true
-install_command=python -m pip install {opts} {packages}
 changedir = testing/plugins_integration
 deps = -rtesting/plugins_integration/requirements.txt
 setenv =