diff --git a/Control/AthenaConfiguration/python/TestDefaults.py b/Control/AthenaConfiguration/python/TestDefaults.py
index a3a6fe02c91e2e1e67168e07fc0dbc6ff7d94e4a..0e484cf617a8093ef1db46f649cb16242d375627 100644
--- a/Control/AthenaConfiguration/python/TestDefaults.py
+++ b/Control/AthenaConfiguration/python/TestDefaults.py
@@ -34,6 +34,8 @@ class defaultTestFiles:
     AOD_RUN2_MC = [f"{d}/CampaignInputs/mc20/AOD/mc20_13TeV.410470.PhPy8EG_A14_ttbar_hdamp258p75_nonallhad.recon.AOD.e6337_s3681_r13145/1000events.AOD.27121237._002005.pool.root.1"]
     AOD_RUN3_DATA = [f"{d}/CampaignInputs/data22/AOD/data22_13p6TeV.00431906.physics_Main.merge.AOD.r13928_p5279/1000events.AOD.30220215._001367.pool.root.1"]
     AOD_RUN3_MC = [f"{d}/CampaignInputs/mc21/AOD/mc21_13p6TeV.601229.PhPy8EG_A14_ttbar_hdamp258p75_SingleLep.recon.AOD.e8453_s3873_r13829/1000events.AOD.29787656._000153.pool.root.1"]
+    AOD_RUN4_MC = [f"{d}/PhaseIIUpgrade/AOD/ATLAS-P2-RUN4-03-00-00/mc21_14TeV.601229.PhPy8EG_A14_ttbar_hdamp258p75_SingleLep.merge.AOD.e8481_s4149_r14697_r14702/AOD.33629011._000002.pool.root.1"]
+
 
 
 class defaultGeometryTags: