Update test-gui.yml

.github/workflows/test-gui.yml

@@ -27,7 +27,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y xvfb
         python -m pip install --upgrade pip
-        pip install pyqt5 setuptools
+        pip install pyqt5 pytest setuptools
 
     - name: Start Xvfb
       run: |