diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 032dc0e5b2a65d89bf4f8b88ac108354628fe8a2..fe4ef294c3f685f46b58c932684fcec6dfc3478a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -32,7 +32,7 @@ prepare_JUWELS:
     - module load CuPy
     - pip install -e .
     - pip install pytest-benchmark coverage
-    - alias mpirun='srun'
+    - alias mpirun=srun
 
 
 test_JUWELS:
@@ -68,7 +68,7 @@ test_JUWELS:
     - module load CuPy
   script:
     # - touch benchmarks/output.json
-    - alias mpirun='srun'
+    - alias mpirun=srun
     - echo $SYSTEMNAME
     - sbatch --wait etc/juwels_${SHELL_SCRIPT}.sh
     - touch .coverage.empty