diff --git a/Configuration/PyReleaseValidation/python/relval_2017.py b/Configuration/PyReleaseValidation/python/relval_2017.py
index eb72e9f8f9d21..68bd09c452df1 100644
--- a/Configuration/PyReleaseValidation/python/relval_2017.py
+++ b/Configuration/PyReleaseValidation/python/relval_2017.py
@@ -46,6 +46,7 @@
 #        (QCD 1.8TeV DeepCore)
 #        (TTbar DigiNoHLT)
 #   2023 (TTbar, TTbar PU, TTbar PU premix)
+#        (TTbar FastSim)
 #   2024 (TTbar, TTbar PU, TTbar PU premix)
 numWFIB = [10001.0,10002.0,10003.0,10004.0,10005.0,10006.0,10007.0,10008.0,10009.0,10059.0,10071.0,
            10042.0,10024.0,10025.0,10026.0,10023.0,10224.0,10225.0,10424.0,
@@ -81,6 +82,7 @@
            11723.17,
            11634.601,
            12434.0,12634.0,12634.99,
+           14034.0,
            12834.0,13034.0,13034.99,]
 for numWF in numWFIB:
     if not numWF in _upgrade_workflows: continue
diff --git a/Configuration/PyReleaseValidation/python/upgradeWorkflowComponents.py b/Configuration/PyReleaseValidation/python/upgradeWorkflowComponents.py
index 7531cecebd4ec..d3445fe085c38 100644
--- a/Configuration/PyReleaseValidation/python/upgradeWorkflowComponents.py
+++ b/Configuration/PyReleaseValidation/python/upgradeWorkflowComponents.py
@@ -28,6 +28,8 @@
     '2021FSPU',
     '2021postEE',
     '2021postEEPU',
+    '2023FS',
+    '2023FSPU',
 ]
 
 upgradeKeys[2026] = [
@@ -2079,7 +2081,7 @@ def setup_(self, step, stepName, stepDict, k, properties):
         else:
             stepDict[stepName][k] = merge([stepDict[step][k]])
     def condition(self, fragment, stepList, key, hasHarvest):
-        return '2021FS' in key
+        return ('2021FS' in key or '2023FS' in key)
 upgradeWFs['Run3FStrackingOnly'] = UpgradeWorkflow_Run3FStrackingOnly(
     steps = [
         'Gen',
@@ -2106,7 +2108,7 @@ def setup_(self, step, stepName, stepDict, k, properties):
         else:
             stepDict[stepName][k] = None
     def condition(self, fragment, stepList, key, hasHarvest):
-        return '2021FS' in key and fragment=="MinBias_14TeV"
+        return ('2021FS' in key or '2023FS' in key) and fragment=="MinBias_14TeV"
 upgradeWFs['Run3FSMBMixing'] = UpgradeWorkflow_Run3FSMBMixing(
     steps = [
         'Gen',
@@ -2340,6 +2342,14 @@ def condition(self, fragment, stepList, key, hasHarvest):
         'BeamSpot': 'Realistic25ns13p6TeVEarly2022Collision',
         'ScenToRun' : ['GenSim','Digi','RecoNano','HARVESTNano','ALCA'],
     },
+    '2023FS' : {
+        'Geom' : 'DB:Extended',
+        'GT' : 'auto:phase1_2023_realistic',
+        'HLTmenu': '@relval2022',
+        'Era' : 'Run3_FastSim',
+        'BeamSpot': 'Realistic25ns13p6TeVEarly2022Collision',
+        'ScenToRun' : ['Gen','FastSimRun3','HARVESTFastRun3'],
+    },
 }
 
 # standard PU sequences