Take https://github.com/pytest-dev/pytest/pull/12875/files#r1795756443 into account

Author: Pierre-Sassoulas

.github/workflows/test.yml

@@ -54,12 +54,15 @@ jobs:
       fail-fast: false
       matrix:
         name: [
+          "windows-py39-pluggy",
           "windows-py39",
           "windows-py310",
           "windows-py311",
           "windows-py312",
           "windows-py313",
 
+          "ubuntu-py39-pluggy",
+          "ubuntu-py39-freeze",
           "ubuntu-py39",
           "ubuntu-py310",
           "ubuntu-py311",
@@ -77,6 +80,10 @@ jobs:
         ]
 
         include:
+          - name: "windows-py39-pluggy"
+            python: "3.9"
+            os: windows-latest
+            tox_env: "py39-pluggymain-pylib-xdist"
           - name: "windows-py39"
             python: "3.9"
             os: windows-latest
@@ -98,6 +105,14 @@ jobs:
             os: windows-latest
             tox_env: "py313"
 
+          - name: "ubuntu-py39-pluggy"
+            python: "3.9"
+            os: ubuntu-latest
+            tox_env: "py39-pluggymain-pylib-xdist"
+          - name: "ubuntu-py39-freeze"
+            python: "3.9"
+            os: ubuntu-latest
+            tox_env: "py39-freeze"
           - name: "ubuntu-py39"
             python: "3.9"
             os: ubuntu-latest

tox.ini

@@ -14,6 +14,7 @@ envlist =
     doctesting
     doctesting-coverage
     plugins
+    py39-freeze
     docs
     docs-checklinks
 
@@ -176,7 +177,7 @@ commands =
     pytest pytest_twisted_integration.py
     pytest simple_integration.py --force-sugar --flakes
 
-[testenv:py39]
+[testenv:py39-freeze]
 description =
     test pytest frozen with `pyinstaller` under `{basepython}`
 changedir = testing/freeze