diff --git a/Trigger/TrigValidation/TrigAnalysisTest/test/test_trigAna_HITtoAOD_trigRel21_mc16a_build.py b/Trigger/TrigValidation/TrigAnalysisTest/test/test_trigAna_HITtoAOD_trigRel21_mc16a_build.py
index fff2952e1bbb703620a1fb11e744dc3e1f25bb6a..70405a41232dc99470841167ee3278cb3ed10954 100755
--- a/Trigger/TrigValidation/TrigAnalysisTest/test/test_trigAna_HITtoAOD_trigRel21_mc16a_build.py
+++ b/Trigger/TrigValidation/TrigAnalysisTest/test/test_trigAna_HITtoAOD_trigRel21_mc16a_build.py
@@ -59,7 +59,7 @@ rdo2rdotrig.args = '--inputRDOFile=RDO.pool.root --outputRDO_TRIGFile=RDO_TRIG.p
 rdo2rdotrig.args += ' --asetup="RDOtoRDOTrigger:Athena,21.0-mc16a,slc6,latest"'
 rdo2rdotrig.args += ' --triggerConfig="MCRECO:MC_pp_v6_tight_mc_prescale"'
 rdo2rdotrig.args += ' --imf="all:True"'
-rdo2rdotrig.args += ' --preExec="all:from TriggerJobOpts.TriggerFlags import TriggerFlags; TriggerFlags.run2Config=\"2016\""'
+rdo2rdotrig.args += ' --preExec="all:from TriggerJobOpts.TriggerFlags import TriggerFlags; TriggerFlags.run2Config=\'2016\'"'
 
 # Clear AthFile cache from r21 because it is incompatible with py3 r22 (ATR-21489)
 rm_cache = ExecStep.ExecStep('ClearAthFileCache')