diff --git a/Control/CalypsoExample/GeoModelTest/python/GeoModelTestConfig.py b/Control/CalypsoExample/GeoModelTest/python/GeoModelTestConfig.py
index dac052eb977a427a38bae24daece5ea6a727e497..26b16614da6e826fb5d0922c16ccbb25bc16f423 100644
--- a/Control/CalypsoExample/GeoModelTest/python/GeoModelTestConfig.py
+++ b/Control/CalypsoExample/GeoModelTest/python/GeoModelTestConfig.py
@@ -66,8 +66,8 @@ if __name__ == "__main__":
     ConfigFlags.lock()
 
 # Configure components
-    from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
-    acc = MainServicesSerialCfg()
+    from AthenaConfiguration.MainServicesConfig import MainServicesCfg
+    acc = MainServicesCfg(ConfigFlags)
 
 # Set things up to create a conditions DB with neutral Tracker alignment transforms
     acc.merge(GeoModelTestCfg(ConfigFlags))
diff --git a/Control/CalypsoExample/RDOReadExample/python/RDOReadExampleConfig.py b/Control/CalypsoExample/RDOReadExample/python/RDOReadExampleConfig.py
index 907a7a6753b99d765b7e0825155081067a43a273..e5077e5f4260ae23c3b338a09fedbe2a383fd554 100644
--- a/Control/CalypsoExample/RDOReadExample/python/RDOReadExampleConfig.py
+++ b/Control/CalypsoExample/RDOReadExample/python/RDOReadExampleConfig.py
@@ -33,9 +33,9 @@ if __name__ == "__main__":
     ConfigFlags.lock()
 
 # Configure components
-    from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+    from AthenaConfiguration.MainServicesConfig import MainServicesCfg
     from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
-    acc = MainServicesSerialCfg()
+    acc = MainServicesCfg(ConfigFlags)
     acc.merge(PoolReadCfg(ConfigFlags))
 
 # Set things up to create a conditions DB with neutral Tracker alignment transforms
diff --git a/Control/CalypsoExample/WriteAlignment/python/WriteAlignmentConfig.py b/Control/CalypsoExample/WriteAlignment/python/WriteAlignmentConfig.py
index 5e99b3973e6b8721e537ffcfe8026fc3f70ec490..f875efc3c020f4edccf71e99a4c7679351e1c908 100644
--- a/Control/CalypsoExample/WriteAlignment/python/WriteAlignmentConfig.py
+++ b/Control/CalypsoExample/WriteAlignment/python/WriteAlignmentConfig.py
@@ -58,8 +58,8 @@ if __name__ == "__main__":
     ConfigFlags.lock()
 
 # Configure components
-    from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
-    acc = MainServicesSerialCfg()
+    from AthenaConfiguration.MainServicesConfig import MainServicesCfg
+    acc = MainServicesCfg(ConfigFlags)
 
 # Set things up to create a conditions DB with neutral Tracker alignment transforms
     acc.merge(WriteAlignmentCfg(ConfigFlags))
diff --git a/DetectorDescription/GeoModel/FaserGeoModel/python/DipoleGMConfig.py b/DetectorDescription/GeoModel/FaserGeoModel/python/DipoleGMConfig.py
index 3c78e5f70734f2ad43c7d3589e6fb89f097f1048..7030673d577076d94e77491c799c0210bc131b2f 100644
--- a/DetectorDescription/GeoModel/FaserGeoModel/python/DipoleGMConfig.py
+++ b/DetectorDescription/GeoModel/FaserGeoModel/python/DipoleGMConfig.py
@@ -17,7 +17,7 @@ if __name__ == "__main__":
   from AthenaCommon.Constants import DEBUG
   from AthenaCommon.Configurable import Configurable
   from CalypsoConfiguration.AllConfigFlags import ConfigFlags
-  from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+  from AthenaConfiguration.MainServicesConfig import MainServicesCfg
   from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
   # Set up logging and new style config
   log.setLevel(DEBUG)
@@ -44,7 +44,7 @@ if __name__ == "__main__":
   #
   ConfigFlags.lock()
   # Construct ComponentAccumulator
-  acc = MainServicesSerialCfg()
+  acc = MainServicesCfg(ConfigFlags)
   acc.merge(PoolReadCfg(ConfigFlags))
   # acc.merge(ScintGeometryCfg(ConfigFlags)) 
   # acc.merge(FaserSCT_GeometryCfg(ConfigFlags)) 
diff --git a/DetectorDescription/GeoModel/FaserGeoModel/python/SCTGMConfig.py b/DetectorDescription/GeoModel/FaserGeoModel/python/SCTGMConfig.py
index cbc2b6786c516dcb1a35d0ddfcd3ced8ee92d29d..3532d3a958f95efa17e9fdad813eb4fed30c8662 100644
--- a/DetectorDescription/GeoModel/FaserGeoModel/python/SCTGMConfig.py
+++ b/DetectorDescription/GeoModel/FaserGeoModel/python/SCTGMConfig.py
@@ -16,7 +16,7 @@ if __name__ == "__main__":
   from AthenaCommon.Constants import DEBUG
   from AthenaCommon.Configurable import Configurable
   from CalypsoConfiguration.AllConfigFlags import ConfigFlags
-  from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+  from AthenaConfiguration.MainServicesConfig import MainServicesCfg
   from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
   # Set up logging and new style config
   log.setLevel(DEBUG)
@@ -36,7 +36,7 @@ if __name__ == "__main__":
   #
   ConfigFlags.lock()
   # Construct ComponentAccumulator
-  acc = MainServicesSerialCfg()
+  acc = MainServicesCfg(ConfigFlags)
   acc.merge(PoolReadCfg(ConfigFlags))
   # acc.merge(ScintGeometryCfg(ConfigFlags)) 
   acc.merge(FaserSCT_GeometryCfg(ConfigFlags)) 
diff --git a/DetectorDescription/GeoModel/FaserGeoModel/python/ScintGMConfig.py b/DetectorDescription/GeoModel/FaserGeoModel/python/ScintGMConfig.py
index 10488b0a881178756230345835ab8bc0f00d971d..b2f9bddadde0d34e6b4ca3fbbe5dc7e2f6d4df9d 100644
--- a/DetectorDescription/GeoModel/FaserGeoModel/python/ScintGMConfig.py
+++ b/DetectorDescription/GeoModel/FaserGeoModel/python/ScintGMConfig.py
@@ -25,7 +25,7 @@ if __name__ == "__main__":
   from AthenaCommon.Constants import DEBUG
   from AthenaCommon.Configurable import Configurable
   from AthenaConfiguration.AllConfigFlags import ConfigFlags
-  from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+  from AthenaConfiguration.MainServicesConfig import MainServicesCfg
   from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
   # Set up logging and new style config
   log.setLevel(DEBUG)
@@ -46,7 +46,7 @@ if __name__ == "__main__":
   #
   ConfigFlags.lock()
   # Construct ComponentAccumulator
-  acc = MainServicesSerialCfg()
+  acc = MainServicesCfg(ConfigFlags)
   acc.merge(PoolReadCfg(ConfigFlags))
   acc.merge(ScintGeometryCfg(ConfigFlags)) # FIXME This sets up the whole Scint geometry would be nicer just to set up min required
   #acc.getService("StoreGateSvc").Dump=True
diff --git a/DetectorDescription/GeoModel/FaserGeoModel/test/FaserGeometryConfig_EVNT_test.py b/DetectorDescription/GeoModel/FaserGeoModel/test/FaserGeometryConfig_EVNT_test.py
index 7320c4ae9f2304d05839b07f2a95f3824e2d4452..df77078c8a1b4b40830ed08c0a9e99d528c69bbf 100644
--- a/DetectorDescription/GeoModel/FaserGeoModel/test/FaserGeometryConfig_EVNT_test.py
+++ b/DetectorDescription/GeoModel/FaserGeoModel/test/FaserGeometryConfig_EVNT_test.py
@@ -10,7 +10,7 @@ if __name__ == "__main__":
     from AthenaCommon.Constants import VERBOSE, INFO
     from AthenaCommon.Configurable import Configurable
     from CalypsoConfiguration.AllConfigFlags import ConfigFlags
-    from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+    from AthenaConfiguration.MainServicesConfig import MainServicesCfg
     from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
     # Set up logging and new style config
     from FaserGeoModel.FaserGeoModelConfig import FaserGeometryCfg
@@ -32,7 +32,7 @@ if __name__ == "__main__":
     ConfigFlags.lock()
 
     # Construct ComponentAccumulator
-    acc = MainServicesSerialCfg()
+    acc = MainServicesCfg(ConfigFlags)
     acc.merge(PoolReadCfg(ConfigFlags))
     acc.merge(FaserGeometryCfg(ConfigFlags))
     # acc.getService("StoreGateSvc").Dump=True
diff --git a/Simulation/G4Faser/G4FaserAlg/test/runG4.py b/Simulation/G4Faser/G4FaserAlg/test/runG4.py
index b46088b319143929ee4370e1940a4587c223c67e..dcf8769e84a59d1dd2c95d54de99dfd84fbf13bd 100644
--- a/Simulation/G4Faser/G4FaserAlg/test/runG4.py
+++ b/Simulation/G4Faser/G4FaserAlg/test/runG4.py
@@ -13,7 +13,7 @@ if __name__ == "__main__":
     from AthenaCommon.Constants import VERBOSE, INFO
     from AthenaCommon.Configurable import Configurable
     from CalypsoConfiguration.AllConfigFlags import ConfigFlags
-    from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+    from AthenaConfiguration.MainServicesConfig import MainServicesCfg
     from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
     from McEventSelector.McEventSelectorConfig import McEventSelectorCfg
     from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
@@ -50,8 +50,6 @@ if __name__ == "__main__":
     ConfigFlags.GeoModel.AtlasVersion = "ATLAS-R2-2016-01-00-01" # Always needed to fool autoconfig
 # Workaround to avoid problematic ISF code
     ConfigFlags.GeoModel.Layout = "Development"
-# To be sure...
-    ConfigFlags.Concurrency.NumThreads = 1
 #
 # Output settings
 #
@@ -84,7 +82,7 @@ if __name__ == "__main__":
 #
 # Construct ComponentAccumulator
 #
-    acc = MainServicesSerialCfg()
+    acc = MainServicesCfg(ConfigFlags)
 #
 # Particle Gun generator (comment out to read generator file)
 # Raw energies (without units given) are interpreted as MeV
diff --git a/Simulation/ISF/ISF_Core/FaserISF_Services/test/FaserISF_ServicesConfigNew_test.py b/Simulation/ISF/ISF_Core/FaserISF_Services/test/FaserISF_ServicesConfigNew_test.py
index 60000958a1d829595bcb59b5ab7a0d98e17c1634..e32a6a813e3c4829cf2682dd644557e920fbef0c 100644
--- a/Simulation/ISF/ISF_Core/FaserISF_Services/test/FaserISF_ServicesConfigNew_test.py
+++ b/Simulation/ISF/ISF_Core/FaserISF_Services/test/FaserISF_ServicesConfigNew_test.py
@@ -4,7 +4,7 @@
 Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
 """
 if __name__ == '__main__':
-  from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+  from AthenaConfiguration.MainServicesConfig import MainServicesCfg
   import os
 
   # Set up logging and config behaviour
@@ -31,7 +31,7 @@ if __name__ == '__main__':
   from FaserISF_Services.FaserISF_ServicesConfigNew import FaserTruthServiceCfg, FaserGeoIDSvcCfg
 
   ## Initialize a new component accumulator
-  cfg = MainServicesSerialCfg()
+  cfg = MainServicesCfg(ConfigFlags)
 
   #add the algorithm
   cfg.merge(FaserTruthServiceCfg(ConfigFlags))
diff --git a/Tracker/TrackerDigitization/FaserSCT_Digitization/test/FaserSCT_DigitizationDbg.py b/Tracker/TrackerDigitization/FaserSCT_Digitization/test/FaserSCT_DigitizationDbg.py
index ad9d5c8c34eaa38c5de4a5aeb6b8fc4df79ed7f4..a2c53702015998e93ee9d4368e416e4908fd2882 100644
--- a/Tracker/TrackerDigitization/FaserSCT_Digitization/test/FaserSCT_DigitizationDbg.py
+++ b/Tracker/TrackerDigitization/FaserSCT_Digitization/test/FaserSCT_DigitizationDbg.py
@@ -9,7 +9,7 @@ from AthenaCommon.Constants import DEBUG, VERBOSE, INFO
 from AthenaCommon.Configurable import Configurable
 from CalypsoConfiguration.AllConfigFlags import ConfigFlags
 from AthenaConfiguration.TestDefaults import defaultTestFiles
-from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+from AthenaConfiguration.MainServicesConfig import MainServicesCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AthenaPoolCnvSvc.PoolWriteConfig import PoolWriteCfg
 from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
@@ -38,7 +38,7 @@ ConfigFlags.Digitization.TruthOutput = True
 ConfigFlags.lock()
 
 # Core components
-acc = MainServicesSerialCfg()
+acc = MainServicesCfg(ConfigFlags)
 acc.merge(PoolReadCfg(ConfigFlags))
 acc.merge(PoolWriteCfg(ConfigFlags))
 
diff --git a/Tracker/TrackerDigitization/FaserSCT_Digitization/test/SCT_DigitizationConfigNew_test.py b/Tracker/TrackerDigitization/FaserSCT_Digitization/test/SCT_DigitizationConfigNew_test.py
index 2139bfc6d3ad80c4896dd3d9ad55cb7aafe0fd7a..90006a2e24f032596adef46300960232e196ab0d 100644
--- a/Tracker/TrackerDigitization/FaserSCT_Digitization/test/SCT_DigitizationConfigNew_test.py
+++ b/Tracker/TrackerDigitization/FaserSCT_Digitization/test/SCT_DigitizationConfigNew_test.py
@@ -8,7 +8,7 @@ from AthenaCommon.Constants import DEBUG
 from AthenaCommon.Configurable import Configurable
 from AthenaConfiguration.ComponentAccumulator import ComponentAccumulator
 from AthenaConfiguration.AllConfigFlags import ConfigFlags
-from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+from AthenaConfiguration.MainServicesConfig import MainServicesCfg
 from AthenaConfiguration.TestDefaults import defaultTestFiles
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AtlasGeoModel.InDetGMConfig import InDetGeometryCfg
@@ -24,7 +24,7 @@ ConfigFlags.GeoModel.Align.Dynamic = False
 ConfigFlags.Concurrency.NumThreads = 1
 ConfigFlags.lock()
 # Construct our accumulator to run
-acc = MainServicesSerialCfg()
+acc = MainServicesCfg(ConfigFlags)
 acc.merge(PoolReadCfg(ConfigFlags))
 acc.merge(FaserSCT_DigitizationHSCfg(ConfigFlags))
 # Dump config
diff --git a/Tracker/TrackerRecAlgs/TrackerPrepRawDataFormation/test/FaserSCT_ClusterizationDbg.py b/Tracker/TrackerRecAlgs/TrackerPrepRawDataFormation/test/FaserSCT_ClusterizationDbg.py
index 0cec89191af71e980f5109f60577fc9d1c323c7b..f0a01274887b010e290228cc5d8f52a97981175f 100644
--- a/Tracker/TrackerRecAlgs/TrackerPrepRawDataFormation/test/FaserSCT_ClusterizationDbg.py
+++ b/Tracker/TrackerRecAlgs/TrackerPrepRawDataFormation/test/FaserSCT_ClusterizationDbg.py
@@ -9,7 +9,7 @@ from AthenaCommon.Constants import DEBUG, VERBOSE, INFO
 from AthenaCommon.Configurable import Configurable
 from CalypsoConfiguration.AllConfigFlags import ConfigFlags
 from AthenaConfiguration.TestDefaults import defaultTestFiles
-from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+from AthenaConfiguration.MainServicesConfig import MainServicesCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AthenaPoolCnvSvc.PoolWriteConfig import PoolWriteCfg
 from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
@@ -35,7 +35,7 @@ ConfigFlags.GeoModel.AtlasVersion = "ATLAS-R2-2016-01-00-01" # Always needed to
 ConfigFlags.lock()
 
 # Core components
-acc = MainServicesSerialCfg()
+acc = MainServicesCfg(ConfigFlags)
 acc.merge(PoolReadCfg(ConfigFlags))
 acc.merge(PoolWriteCfg(ConfigFlags))
 
diff --git a/Tracker/TrackerRecAlgs/TrackerSpacePointFormation/test/StatisticsDbg.py b/Tracker/TrackerRecAlgs/TrackerSpacePointFormation/test/StatisticsDbg.py
index 2310699cd43d759ecf026c8ddc7159bcf4de694f..614a249efd38eaa13625c96a2f2544b5e194cd9c 100644
--- a/Tracker/TrackerRecAlgs/TrackerSpacePointFormation/test/StatisticsDbg.py
+++ b/Tracker/TrackerRecAlgs/TrackerSpacePointFormation/test/StatisticsDbg.py
@@ -9,7 +9,7 @@ from AthenaCommon.Constants import DEBUG, VERBOSE, INFO
 from AthenaCommon.Configurable import Configurable
 from CalypsoConfiguration.AllConfigFlags import ConfigFlags
 from AthenaConfiguration.TestDefaults import defaultTestFiles
-from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+from AthenaConfiguration.MainServicesConfig import MainServicesCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AthenaPoolCnvSvc.PoolWriteConfig import PoolWriteCfg
 from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
@@ -36,7 +36,7 @@ ConfigFlags.GeoModel.AtlasVersion = "ATLAS-R2-2016-01-00-01" # Always needed to
 ConfigFlags.lock()
 
 # Core components
-acc = MainServicesSerialCfg()
+acc = MainServicesCfg(ConfigFlags)
 acc.merge(PoolReadCfg(ConfigFlags))
 acc.merge(PoolWriteCfg(ConfigFlags))
 
diff --git a/Tracker/TrackerRecAlgs/TrackerSpacePointFormation/test/TrackerSpacePointFormationDbg.py b/Tracker/TrackerRecAlgs/TrackerSpacePointFormation/test/TrackerSpacePointFormationDbg.py
index 469f2308694d1bb6082bc5bb0822e976a742c667..9afb75c91c79b11c135b92b2e55668157057b1c6 100644
--- a/Tracker/TrackerRecAlgs/TrackerSpacePointFormation/test/TrackerSpacePointFormationDbg.py
+++ b/Tracker/TrackerRecAlgs/TrackerSpacePointFormation/test/TrackerSpacePointFormationDbg.py
@@ -9,7 +9,7 @@ from AthenaCommon.Constants import DEBUG, VERBOSE, INFO
 from AthenaCommon.Configurable import Configurable
 from CalypsoConfiguration.AllConfigFlags import ConfigFlags
 from AthenaConfiguration.TestDefaults import defaultTestFiles
-from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+from AthenaConfiguration.MainServicesConfig import MainServicesCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AthenaPoolCnvSvc.PoolWriteConfig import PoolWriteCfg
 from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
@@ -36,7 +36,7 @@ ConfigFlags.GeoModel.AtlasVersion = "ATLAS-R2-2016-01-00-01" # Always needed to
 ConfigFlags.lock()
 
 # Core components
-acc = MainServicesSerialCfg()
+acc = MainServicesCfg(ConfigFlags)
 acc.merge(PoolReadCfg(ConfigFlags))
 acc.merge(PoolWriteCfg(ConfigFlags))
 
diff --git a/Tracker/TrackerRecAlgs/TruthSeededTrackFinder/test/TruthSeededTrackFinderDbg.py b/Tracker/TrackerRecAlgs/TruthSeededTrackFinder/test/TruthSeededTrackFinderDbg.py
index 0acc887c5a02a95625706d6fc2c4235f188fa356..5d8d944509c4a5233dc044a8e5b2e5a771a47bbe 100644
--- a/Tracker/TrackerRecAlgs/TruthSeededTrackFinder/test/TruthSeededTrackFinderDbg.py
+++ b/Tracker/TrackerRecAlgs/TruthSeededTrackFinder/test/TruthSeededTrackFinderDbg.py
@@ -9,7 +9,7 @@ from AthenaCommon.Constants import DEBUG, VERBOSE, INFO
 from AthenaCommon.Configurable import Configurable
 from CalypsoConfiguration.AllConfigFlags import ConfigFlags
 from AthenaConfiguration.TestDefaults import defaultTestFiles
-from AthenaConfiguration.MainServicesConfig import MainServicesSerialCfg
+from AthenaConfiguration.MainServicesConfig import MainServicesCfg
 from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
 from AthenaPoolCnvSvc.PoolWriteConfig import PoolWriteCfg
 from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
@@ -37,7 +37,7 @@ ConfigFlags.GeoModel.AtlasVersion = "ATLAS-R2-2016-01-00-01" # Always needed to
 ConfigFlags.lock()
 
 # Core components
-acc = MainServicesSerialCfg()
+acc = MainServicesCfg(ConfigFlags)
 acc.merge(PoolReadCfg(ConfigFlags))
 acc.merge(PoolWriteCfg(ConfigFlags))