Disable pytest cache in workflow

.github/workflows/test-package.yml

@@ -56,7 +56,7 @@ jobs:
     - name: Test install with pytest (including doctests)
       run: |
         python -c "import tests"  # Compiles hissp.basic on package import.
-        pytest -v --cov=hissp --cov-report=xml --doctest-modules --doctest-glob *.md src/hissp/*.lissp tests/ docs/ $(python -c "import hissp; print(hissp.__path__[0])")
+        pytest -p no:cacheprovider -v --cov=hissp --cov-report=xml --doctest-modules --doctest-glob *.md src/hissp/*.lissp tests/ docs/ $(python -c "import hissp; print(hissp.__path__[0])")
     - name: Codecov
       uses: codecov/[email protected]
       with: