install pytest as well

.github/workflows/run_tests.yml

@@ -1,7 +1,7 @@
 # This workflow will install Python dependencies, run tests and lint with a single version of Python
 # For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python
 
-name: Python application
+name: Test astrotemplate-db
 
 on:
   push:
@@ -26,7 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install .
+        pip install .[test]
     - name: Test with pytest
       run: |
         pytest tests