diff --git a/tst/regression/test_suites/particle_leapfrog_outflow/particle_leapfrog_outflow.py b/tst/regression/test_suites/particle_leapfrog_outflow/particle_leapfrog_outflow.py
index 6b855e2a9fbc..cf806120a946 100644
--- a/tst/regression/test_suites/particle_leapfrog_outflow/particle_leapfrog_outflow.py
+++ b/tst/regression/test_suites/particle_leapfrog_outflow/particle_leapfrog_outflow.py
@@ -57,5 +57,7 @@ def Analyse(self, parameters):
         )
         if ref_data.shape != final_data.shape:
             print("TEST FAIL: Mismatch between actual and reference data shape.")
+            print(ref_data)
+            print(final_data)
             return False
         return (np.abs(final_data - ref_data) <= 1e-10).all()