diff --git a/AllenOnline/tests/options/check_duplicates.py b/AllenOnline/tests/options/check_duplicates.py
index 5d454b2d4fef27390050a7c92f9067f7b249e6d6..a4390045263e92908fa523f63dc39269e97c1699 100644
--- a/AllenOnline/tests/options/check_duplicates.py
+++ b/AllenOnline/tests/options/check_duplicates.py
@@ -14,7 +14,7 @@ from Configurables import IODataManager
 from Configurables import createODIN, HltDecReportsDecoder
 from Configurables import LHCb__UnpackRawEvent as UnpackRawEvent
 from DDDB.CheckDD4Hep import UseDD4Hep
-from GaudiConf import IOHelper
+from Gaudi.Configuration import EventSelector
 
 from AllenCore.configuration_options import is_allen_standalone
 is_allen_standalone.global_bind(standalone=True)
@@ -67,7 +67,9 @@ check_seq.Members = [unpack_raw, createODIN(), dec_reports]
 
 ApplicationMgr().TopAlg = [check_seq]
 
-IOHelper('MDF').inputFiles(args.mdf, clear=True)
+EventSelector(Input=[
+    f"DATAFILE='{mdf}' SVC='LHCb::MDFSelector' OPT='READ'" for mdf in args.mdf
+])
 
 # Some extra stuff for timing table
 ApplicationMgr().ExtSvc += ['ToolSvc', 'AuditorSvc']
diff --git a/AllenOnline/tests/options/test_allen_lumisummaries.py b/AllenOnline/tests/options/test_allen_lumisummaries.py
index 62461e31b2c8decbaf7330aa46639e72a625f5c9..396bfa97f72669f691c81e3939ade4d63aecc52d 100755
--- a/AllenOnline/tests/options/test_allen_lumisummaries.py
+++ b/AllenOnline/tests/options/test_allen_lumisummaries.py
@@ -10,7 +10,6 @@
 ###############################################################################
 """Check decoding and encoding of HltLumiSummary
 """
-from GaudiConf import IOHelper
 from Gaudi.Configuration import VERBOSE
 import GaudiPython as GP
 from PyConf.Algorithms import HltLumiWriter, HltLumiSummaryDecoder, HltRoutingBitsFilter, VoidFilter, HltDecReportsDecoder, HltLumiSummaryDecoder, HltLumiSummaryMonitor, PrintHeader, LHCb__SelectViewForHltSourceID
diff --git a/MooreScripts/tests/options/HLT1Slim/check_run_change.py b/MooreScripts/tests/options/HLT1Slim/check_run_change.py
index 60021818c2988d90e9375148cc4ccda668477864..b0513d393cf63c8eee11e889821842ab73389cc4 100644
--- a/MooreScripts/tests/options/HLT1Slim/check_run_change.py
+++ b/MooreScripts/tests/options/HLT1Slim/check_run_change.py
@@ -16,7 +16,7 @@ from Configurables import IODataManager
 from Configurables import createODIN, HltDecReportsDecoder
 from Configurables import LHCb__UnpackRawEvent as UnpackRawEvent
 from DDDB.CheckDD4Hep import UseDD4Hep
-from GaudiConf import IOHelper
+from Gaudi.Configuration import EventSelector
 from GaudiPython.Bindings import AppMgr, gbl
 from PyConf.application import configured_ann_svc
 from Allen.tck import property_from_git
@@ -63,7 +63,9 @@ check_seq.Members = [unpack_raw, createODIN(), dec_reports]
 
 ApplicationMgr().TopAlg = [check_seq]
 
-IOHelper('MDF').inputFiles(mdfs, clear=True)
+EventSelector(Input=[
+    f"DATAFILE='{mdf}' SVC='LHCb::MDFSelector' OPT='READ'" for mdf in mdfs
+])
 
 # Use the metainfo repository created by the create_hlt1_tck test
 metainfo_repos.global_bind(repos=[('lhcb-metainfo/.git', 'master')])