diff --git a/Simulation/ISF/ISF_Core/ISF_Algorithms/python/CollectionMergerConfig.py b/Simulation/ISF/ISF_Core/ISF_Algorithms/python/CollectionMergerConfig.py
index 0074f8cbb935965d12a71aeacaf4277e26b62e84..e9be1e18571ce4cf161fb9bf863fe65c80786845 100644
--- a/Simulation/ISF/ISF_Core/ISF_Algorithms/python/CollectionMergerConfig.py
+++ b/Simulation/ISF/ISF_Core/ISF_Algorithms/python/CollectionMergerConfig.py
@@ -25,7 +25,7 @@ def ISFCollectionMergerCfg(flags,name="ISF_CollectionMerger", **kwargs):
     kwargs.setdefault( "InputTGCHits",              [ ] )
     hardscatterSG=""
     try:
-        if flags.Sim.DoFullChain and (flags.Digitization.Pileup is True):
+        if flags.Sim.DoFullChain and (flags.Digitization.PileUp is True):
             hardscatterSG = "OriginalEvent_SG+"
     except RuntimeError as err:
         msg = logging.getLogger(name)
diff --git a/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimServicesTestHelpers.py b/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimServicesTestHelpers.py
index 5ddc801301c8a05094dba6e6029fad4ee8323d0d..e7c826b915d93e70b24d18c05f55a522e50ff5b4 100644
--- a/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimServicesTestHelpers.py
+++ b/Simulation/ISF/ISF_FastCaloSim/ISF_FastCaloSimServices/python/ISF_FastCaloSimServicesTestHelpers.py
@@ -5,6 +5,7 @@ Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
 """
 
 from argparse import ArgumentParser
+from AthenaConfiguration.Enums import ProductionStep
 from AthenaConfiguration.ComponentFactory import CompFactory
 from AthenaConfiguration.ComponentAccumulator import ComponentAccumulator
 
@@ -51,9 +52,9 @@ def defaultTestFlags(configFlags, args):
     configFlags.Input.OverrideRunNumber = True
     configFlags.Input.Files = defaultTestFiles.EVNT # ["root://eosuser.cern.ch///eos/atlas/atlascerngroupdisk/proj-simul/OutputSamples/rel21/mc16_13TeV.photon.E65536.eta20_25.EVNT.merged.pool.root"]
     configFlags.Output.HITSFileName = "myHITSnew.pool.root"
+    configFlags.Common.ProductionStep = ProductionStep.Simulation
 
     # Sim configFlags
-    # Flags taken from old config:
     configFlags.Sim.TruthStrategy = "MC15aPlus"
     configFlags.Sim.PhysicsList = "FTFP_BERT_ATL"
     configFlags.Sim.CalibrationRun = "Off" #"DeadLAr"