diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5604cf7..5f9771d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,12 +21,12 @@ jobs:
           -it --name CLDConfig_CI \
           -v ${{ github.workspace }}:/CLDConfig \
           -v /cvmfs:/cvmfs:shared \
-          -d ghcr.io/aidasoft/centos7:latest /bin/bash
+          -d ghcr.io/key4hep/key4hep-images/alma9 /bin/bash
 
-    - name: Run tests (pytest)
+    - name: Run tests
       run: |
         docker exec CLDConfig_CI /bin/bash -c 'source ${{ matrix.SETUP }};
           cd CLDConfig;
           cmake .;
-          ctest --output-on-failure;
+          ctest --output-on-failure -j2;
         '