CI: or maybe like this

Author: Technologicat

.github/workflows/coverage.yml

@@ -46,6 +46,8 @@ jobs:
         echo "VIRTUAL_ENV=$VIRTUAL_ENV" >> "$GITHUB_ENV"
     - name: Generate coverage report
       run: |
+        pdm use --venv in-project
+        source .venv/bin/activate
         python -m coverage run --source=. -m runtests
         python -m coverage xml
     - name: Upload coverage to Codecov

.github/workflows/python-package.yml

@@ -53,4 +53,6 @@ jobs:
         echo "VIRTUAL_ENV=$VIRTUAL_ENV" >> "$GITHUB_ENV"
     - name: Test with unpythonic.test.fixtures
       run: |
+        pdm use --venv in-project
+        source .venv/bin/activate
         python runtests.py