run only test module to speed up build.

Author: rouilj

.github/workflows/ci-test.yml

@@ -192,11 +192,11 @@ jobs:
               -W "ignore:'U' mode::docutils.io"  \
               -W "ignore:unclosed:ResourceWarning:roundup.roundup.demo" \
               -W "ignore:unclosed file:ResourceWarning:enum" \
-              -v  test/ --cov=roundup
+              -v  test/test_actions.py --cov=roundup
             coverage lcov
           else
             # python2 case
-            pytest -v -r a test/ --cov=roundup
+            pytest -v -r a test/test_actions.py --cov=roundup
           fi
 
       - name: Upload coverage to Codecov