add opengl to installs

.github/workflows/pytest.yml

@@ -10,21 +10,27 @@ jobs:
         python-version: ["3.9", "3.10", "3.11"]
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Check out the code
+        uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libgl1-mesa-glx libglfw3
+
       - name: Install Poetry
         run: |
           python -m pip install --upgrade pip
           pip install poetry
 
       - name: Install dependencies
         run: |
-          poetry install --with dev
+          poetry install --with dev,opengl
 
       - name: Run tests
         run: |