diff --git a/Simulation/G4Faser/G4FaserAlg/test/runGen.py b/Simulation/G4Faser/G4FaserAlg/test/runGen.py
new file mode 100755
index 0000000000000000000000000000000000000000..7ce7118445796b62deea7dec2ea482c9e3e3dfc4
--- /dev/null
+++ b/Simulation/G4Faser/G4FaserAlg/test/runGen.py
@@ -0,0 +1,137 @@
+#!/usr/bin/env python
+if __name__ == "__main__":
+    import os
+    import sys
+    import GaudiPython
+    import ParticleGun as PG
+    from AthenaConfiguration.ComponentAccumulator import ComponentAccumulator
+    from AthenaConfiguration.ComponentFactory import CompFactory
+    from AthenaCommon.AppMgr import *
+    from AthenaCommon.Logging import log, logging
+    from AthenaCommon.SystemOfUnits import TeV
+    from AthenaCommon.PhysicalConstants import pi
+    from AthenaCommon.Constants import VERBOSE, INFO
+    from AthenaCommon.Configurable import Configurable
+    from CalypsoConfiguration.AllConfigFlags import ConfigFlags
+    from CalypsoConfiguration.MainServicesConfig import MainServicesCfg
+    from AthenaPoolCnvSvc.PoolReadConfig import PoolReadCfg
+    from McEventSelector.McEventSelectorConfig import McEventSelectorCfg
+    from OutputStreamAthenaPool.OutputStreamConfig import OutputStreamCfg
+#    from FaserGeoModel.FaserGeoModelConfig import FaserGeometryCfg
+#    from G4FaserAlg.G4FaserAlgConfigNew import G4FaserAlgCfg
+#    from G4FaserServices.G4FaserServicesConfigNew import G4GeometryNotifierSvcCfg
+#
+# Set up logging and new style config
+#
+    log.setLevel(VERBOSE)
+    Configurable.configurableRun3Behavior = True
+#
+# Input settings (Generator file)
+#
+#   from AthenaConfiguration.TestDefaults import defaultTestFiles
+#   ConfigFlags.Input.Files = defaultTestFiles.EVNT
+#
+# Alternatively, these must ALL be explicitly set to run without an input file
+# (if missing, it will try to read metadata from a non-existent file and crash)
+#
+    ConfigFlags.Input.Files = [""]
+    ConfigFlags.Input.isMC = True
+    ConfigFlags.Input.RunNumber = 12345
+    ConfigFlags.Input.Collections = [""]
+    ConfigFlags.Input.ProjectName = "mc19"
+    ConfigFlags.Common.isOnline = False
+    ConfigFlags.Beam.Type = "collisions"
+    ConfigFlags.Beam.Energy = 7*TeV                              # Informational, does not affect simulation
+    ConfigFlags.GeoModel.FaserVersion = "FASER-01"               # Always needed
+    ConfigFlags.IOVDb.GlobalTag = "OFLCOND-XXXX-XXX-XX"          # Always needed; only the OFLCOND part matters
+# Workaround for bug/missing flag; unimportant otherwise 
+    ConfigFlags.addFlag("Input.InitialTimeStamp", 0)
+# Workaround to avoid problematic ISF code
+    ConfigFlags.GeoModel.Layout = "Development"
+#
+# Output settings
+#
+    ConfigFlags.Output.HITSFileName = "my.EVT.pool.root"
+#    ConfigFlags.GeoModel.GeoExportFile = "faserGeo.db" # Optional dump of geometry for browsing in vp1light
+#
+# Geometry-related settings
+# Do not change!
+#
+#    ConfigFlags.Detector.SimulateVeto   = True
+#    ConfigFlags.Detector.GeometryVeto   = True
+#    ConfigFlags.Detector.SimulateTrigger= True
+#    ConfigFlags.Detector.GeometryTrigger= True
+#    ConfigFlags.Detector.SimulatePreshower   = True
+#    ConfigFlags.Detector.GeometryPreshower   = True
+#    ConfigFlags.Detector.SimulateFaserSCT   = True
+#    ConfigFlags.Detector.GeometryFaserSCT   = True
+#    ConfigFlags.Detector.SimulateUpstreamDipole = True
+#    ConfigFlags.Detector.SimulateCentralDipole = True
+#    ConfigFlags.Detector.SimulateDownstreamDipole = True
+#    ConfigFlags.Detector.GeometryUpstreamDipole = True
+#    ConfigFlags.Detector.GeometryCentralDipole = True
+#    ConfigFlags.Detector.GeometryDownstreamDipole = True
+    ConfigFlags.GeoModel.Align.Dynamic  = False
+    ConfigFlags.Sim.ReleaseGeoModel     = False
+#
+# All flags should be set before calling lock
+#
+    ConfigFlags.lock()
+#
+# Construct ComponentAccumulator
+#
+    acc = MainServicesCfg(ConfigFlags)
+#
+# Particle Gun generator (comment out to read generator file)
+# Raw energies (without units given) are interpreted as MeV
+#
+    pg = PG.ParticleGun()
+    pg.McEventKey = "GEN_EVENT"
+    pg.randomSeed = 123456
+    pg.sampler.pid = -13
+    pg.sampler.mom = PG.EThetaMPhiSampler(energy=1*TeV, theta=[0, pi/20], phi=[0, 2*pi], mass=105.71)
+    pg.sampler.pos = PG.PosSampler(x=[-5, 5], y=[-5, 5], z=-2100.0, t=0.0)
+    acc.addEventAlgo(pg, "AthBeginSeq") # to run *before* G4
+#
+# Only one of these two should be used in a given job
+# (MCEventSelectorCfg for generating events with no input file,
+#  PoolReadCfg when reading generator data from an input file)
+#    
+    acc.merge(McEventSelectorCfg(ConfigFlags))
+    # acc.merge(PoolReadCfg(ConfigFlags))
+#
+#  Output stream configuration
+#
+    acc.merge(OutputStreamCfg(ConfigFlags, 
+                              "HITS", 
+                             ["EventInfo#*",
+                              "McEventCollection#TruthEvent",
+                              "McEventCollection#GEN_EVENT",
+                              "ScintHitCollection#*",
+                              "FaserSiHitCollection#*"
+                            ], disableEventTag=True))
+#    acc.getEventAlgo("OutputStreamHITS").AcceptAlgs = ["G4FaserAlg"]               # optional
+    acc.getEventAlgo("OutputStreamHITS").WritingTool.ProcessingTag = "StreamHITS"  # required
+#
+#  Here is the configuration of the Geant4 pieces
+#    
+#    acc.merge(FaserGeometryCfg(ConfigFlags))
+#    acc.merge(G4FaserAlgCfg(ConfigFlags))
+#    acc.addService(G4GeometryNotifierSvcCfg(ConfigFlags, ActivateLVNotifier=True))
+#
+# Verbosity
+#
+#    ConfigFlags.dump()
+#    logging.getLogger('forcomps').setLevel(VERBOSE)
+#    acc.foreach_component("*").OutputLevel = VERBOSE
+#    acc.foreach_component("*ClassID*").OutputLevel = INFO
+#    acc.getService("StoreGateSvc").Dump=True
+#    acc.getService("ConditionStore").Dump=True
+#    acc.printConfig()
+    f=open('FaserG4AppCfg_EVNT.pkl','wb')
+    acc.store(f)
+    f.close()
+#
+# Execute and finish
+#
+    sys.exit(int(acc.run(maxEvents=500).isFailure()))