workflow fix

.github/workflows/tests.yml

@@ -27,10 +27,11 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install poetry
+        poetry config virtualenvs.in-project true
     - name: Install dependencies
       run: |
+        echo "Installing Poetry from root $(pwd)"
         poetry install
-        poetry shell
     - name: Test with pytest
       run: |
-        pytest
+        .venv/bin/pytest