Made the pytest file a bit cleaner and removed a redundant step

.github/workflows/run_tests.yml

@@ -17,10 +17,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install pytest pytest-mock
+        pip install pytest pytest-mock coverage pytest-cov
         pip install -r requirements.txt
-    - name: Install coverage
-      run: pip install coverage pytest-cov
     - name: Testing the code with PyTest
       run: |
         cp config.py.example config.py