one more try...

Author: kdp-cloud

.github/workflows/test-mars.yml

@@ -23,14 +23,16 @@ jobs:
       - uses: actions/checkout@v5
         with:
           repository: elixir-europe/MARS
-          path: .
-          sparse-checkout: 'test-data/'
+          path: test-data
+          sparse-checkout: 'test-data/*'
+      - name: show files
+        run: ls -la .
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
-          cache-dependency-path: 'setup.py'
+          cache-dependency-path: '**/setup.py'
       - run: |
           pip install -e '.[test]'
           pip install keyring keyrings.alt