Take 4: not environment variables

Author: wiredfool

.github/workflows/test-windows.yml

@@ -28,7 +28,6 @@ concurrency:
 
 env:
   COVERAGE_CORE: sysmon
-  TEST_REQUIREMENTS: "tests, test-arrow"
 
 jobs:
   build:
@@ -39,13 +38,14 @@ jobs:
         python-version: [ "3.10", "3.11", "3.12", "3.13" ]
         architecture: ["x64"]
         os: ["windows-latest"]
+        pyarrow: ["true"]
         include:
             # Test the oldest Python on 32-bit
-            - { python-version: "3.9", architecture: "x86", os: "windows-2019", env: {TEST_REQUIREMENTS: "tests"} }
+            - { python-version: "3.9", architecture: "x86", os: "windows-2019", pyarrow: "false" }
             # test the non-pyarrow capable ones
-            - { python-version: "3.14", architecture: "x64", os: "windows-latest", env: {TEST_REQUIREMENTS: "tests"} }
-            - { python-version: "pypy3.11", architecture: "x64", os: "windows-latest", env: {TEST_REQUIREMENTS: "tests"} }
-            - { python-version: "pypy3.10", architecture: "x64", os: "windows-latest", env: {TEST_REQUIREMENTS: "tests"} }
+            - { python-version: "3.14", architecture: "x64", os: "windows-latest", pyarrow: "false" }
+            - { python-version: "pypy3.11", architecture: "x64", os: "windows-latest", pyarrow: "false" }
+            - { python-version: "pypy3.10", architecture: "x64", os: "windows-latest", pyarrow: "false" }
     timeout-minutes: 30
 
     name: Python ${{ matrix.python-version }} (${{ matrix.architecture }})
@@ -92,6 +92,11 @@ jobs:
       run: |
         python3 -m pip install PyQt6
 
+    - name: Install PyArrow Test Dependency
+      if: "matrix.pyarrow == 'true'"
+      run: |
+        python3 -m pip install --only-binary=:all: pyarrow
+
     - name: Install dependencies
       id: install
       run: |
@@ -190,7 +195,7 @@ jobs:
     - name: Build Pillow
       run: |
         $FLAGS="-C raqm=vendor -C fribidi=vendor"
-        cmd /c "winbuild\build\build_env.cmd && $env:pythonLocation\python.exe -m pip install -v $FLAGS .[$env:TEST_REQUIREMENTS]"
+        cmd /c "winbuild\build\build_env.cmd && $env:pythonLocation\python.exe -m pip install -v $FLAGS .[tests]"
         & $env:pythonLocation\python.exe selftest.py --installed
       shell: pwsh