diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3bf06e658..f89a7a346 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -23,7 +23,7 @@ env:
   DOCKER_IMAGE_TAG: icecube/skymap_scanner:local
   #
   CI_TEST_RUN_STDOUT_STDERR_DIR: /home/runner/work/skymap_scanner/testrun_outputs
-  N_WORKERS: 4
+  N_WORKERS: 2
   REALTIME_EVENTS_DIR: /home/runner/work/skymap_scanner/skymap_scanner/tests/data/realtime_events
   SKYSCAN_CACHE_DIR: /home/runner/work/skymap_scanner/skymap_scanner/cache
   SKYSCAN_OUTPUT_DIR: /home/runner/work/skymap_scanner/skymap_scanner/output