Activate venv in required steps

.github/workflows/ci.yaml

@@ -81,11 +81,9 @@ jobs:
         echo "Failed to restore Python virtual environment from cache"
         exit 1
 
-    - name: Activate Python ${{ env.DEFAULT_PYTHON }} virtual environment
-      run: . venv/bin/activate
-
     - name: Lint with flake8
       run: |
+        . venv/bin/activate
         # stop the build if there are Python syntax errors or undefined names
         flake8 plexapi --count --select=E9,F63,F7,F82 --show-source --statistics
         # The GitHub editor is 127 chars wide
@@ -138,9 +136,6 @@ jobs:
         echo "Failed to restore Python virtual environment from cache"
         exit 1
 
-    - name: Activate Python ${{ matrix.python-version }} virtual environment
-      run: . venv/bin/activate
-
     - name: Get PMS Docker image digest
       id: docker-digest
       run: |
@@ -187,6 +182,7 @@ jobs:
 
     - name: Bootstrap ${{ matrix.plex }} Plex server
       run: |
+        . venv/bin/activate
         python \
           -u tools/plex-bootstraptest.py \
           --destination plex \
@@ -199,6 +195,7 @@ jobs:
       env:
         TEST_ACCOUNT_ONCE: ${{ matrix.plex == 'unclaimed' }}
       run: |
+        . venv/bin/activate
         pytest \
           -rxXs \
           --ignore=tests/test_sync.py \
@@ -215,6 +212,7 @@ jobs:
         PLEXAPI_HEADER_PLATFORM_VERSION: 11.4.1
         PLEXAPI_HEADER_DEVICE: iPhone
       run: |
+        . venv/bin/activate
         pytest \
           -rxXs \
           --tb=native \
@@ -225,7 +223,9 @@ jobs:
 
     - name: Unlink PMS from MyPlex account
       if: matrix.plex == 'claimed' && always()
-      run: python -u tools/plex-teardowntest.py
+      run: |
+        . venv/bin/activate
+        python -u tools/plex-teardowntest.py
 
     - name: Upload coverage artifact
       uses: actions/upload-artifact@v2
@@ -267,14 +267,12 @@ jobs:
         echo "Failed to restore Python virtual environment from cache"
         exit 1
 
-    - name: Activate Python ${{ env.DEFAULT_PYTHON }} virtual environment
-      run: . venv/bin/activate
-
     - name: Download all coverage artifacts
       uses: actions/download-artifact@v2
 
     - name: Combine coverage results
       run: |
+        . venv/bin/activate
         coverage combine coverage*/.coverage*
         coverage report --fail-under=50
         coverage xml