ci: fix broken assumption about pytest testpaths config

Author: consideRatio

.github/workflows/test.yaml

@@ -166,7 +166,7 @@ jobs:
           # installed package rather than the local directory
           mkdir build
           cd build
-          pytest -c ../pyproject.toml
+          pytest -c ../pyproject.toml ../tests
 
       - name: Upload test reports
         if: always()