diff --git a/applications/apertif/commissioning/tests/verify_correlator_db_output.py b/applications/apertif/commissioning/tests/verify_correlator_db_output.py
index f6c4306adee8556ecb301e201ec095dd58af2814..71e9f272c0ed2d7456aef4833e069355cab527c6 100644
--- a/applications/apertif/commissioning/tests/verify_correlator_db_output.py
+++ b/applications/apertif/commissioning/tests/verify_correlator_db_output.py
@@ -339,7 +339,7 @@ for bui in beamlets:
             if len(atpFail)==0:
                 tc.append_log(tc.V_INFO_DETAILS, reportStr + 'Auto correlation for TP = %s : polarizations = %s and dishes = %s are OK' % (nonZeroTp, nonZeroPolarizations, nonZeroDishes))
             else:
-                tc.append_log(tc.V_ERRORS, reportStr + 'Auto correlation for TP = %s : polarizations = %s and dishes = %s are wrong' % (atpFail, apr.tp_to_pol_indices(tpFail), apr.tp_to_pol_indices(tpFail)))
+                tc.append_log(tc.V_ERRORS, reportStr + 'Auto correlation for TP = %s : polarizations = %s and dishes = %s are wrong' % (atpFail, apr.tp_to_pol_indices(atpFail), apr.tp_to_pol_indices(atpFail)))
                 tc.set_result('FAILED')