diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 054df3ef2f9a317a60c9f6d545f97e99375f645a..5f378a20cb7d544a04c19e0979a28eebdeed9840 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -84,7 +84,7 @@ run_unit_tests:
     - tox -e py3${PY_VERSION}
   parallel:
     matrix: # use the matrix for testing
-      - PY_VERSION: [8, 9, 10, 11]
+      - PY_VERSION: [12]
 
 # Run code coverage on the base image thus also performing unit tests
 run_unit_tests_coverage: