diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 398ce9c49319e1b96243f2b4d8cb0949eca08938..8d218c5fa97e742f6b317fe7269ec38ab6446c1f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -68,7 +68,7 @@ automated_test:
     - python3 -m pip install ".[automated_test]"
     - echo "Running automated test. This can take sometime to finish depending on the test data."
     - echo "Given variables are REFERENCE=$REFERENCE, OUTPUT=$OUTPUT, DETECTOR=$DETECTORS, CALIBRATION=$CALIBRATION"
-    - python3 -m pytest ./tests/test_reference_runs --color yes --verbose --release-test --reference-folder /gpfs/exfel/data/scratch/xcaltst/test/$REFERENCE --out-folder /gpfs/exfel/data/scratch/xcaltst/test/$OUTPUT  --detectors $DETECTORS --calibration $CALIBRATION
+    - python3 -m pytest ./tests/test_reference_runs --color yes --verbose --release-test --reference-folder /gpfs/exfel/data/scratch/xcaltst/test/$REFERENCE --out-folder /gpfs/exfel/data/scratch/xcaltst/test/$OUTPUT  --detectors $DETECTORS --calibration $CALIBRATION  --find-difference
   timeout: 24 hours
 
 cython-editable-install-test: