try a things that's probably stupid...

ci/unit-test.template.yml

@@ -6,7 +6,7 @@
         # use the poetry virtual environment and packages
         - poetry install --with test
         - pwd
-        - $(poetry env info -p)/bin/pytest . ../../${TEST_PREFIX2}${SERVICE_NAME} --junitxml=tests.xml --cov=${SERVICE_NAME} --cov=../../${PATH_PREFIX2}${SERVICE_NAME} --cov-report= --cov-report=
+        - $(poetry env info -p)/bin/pytest . ../../${TEST_PREFIX2}${SERVICE_NAME} --junitxml=tests.xml --cov=${SERVICE_NAME} --cov=../../${PATH_PREFIX2}${SERVICE_NAME} --cov-append --cov-report=
         - mv ./.coverage ${CI_PROJECT_DIR}/.coverage.${SERVICE_NAME}.${CI_COMMIT_SHORT_SHA}
         - mv ./tests.xml ${CI_PROJECT_DIR}/tests.${SERVICE_NAME}.${CI_COMMIT_SHORT_SHA}.xml
     artifacts: