Update blender-test.yml

Author: ivan-perevala

.github/workflows/blender-test.yml

@@ -55,9 +55,13 @@ jobs:
       
       - name: Install dependencies
         run: |
+          sudo apt-get update
+          sudo apt-get install -y xvfb
           python -m pip install --upgrade pip
           pip install pytest
 
       - name: Run tests
         run: |
+          Xvfb :99 -screen 0 1920x1080x24 &
+          export DISPLAY=:99
           pytest --blender="${{ env.BLENDER_DIR }}/blender"