diff --git a/beacon_chain.nimble b/beacon_chain.nimble
index 248c663ef..af3435134 100644
--- a/beacon_chain.nimble
+++ b/beacon_chain.nimble
@@ -13,6 +13,7 @@ skipDirs      = @["nfuzz"]
 bin           = @[
   "beacon_chain/beacon_node",
   "research/serialized_sizes",
+  "nbench/nbench",
   ]
 
 ### Dependencies
diff --git a/nbench/nbench.nim b/nbench/nbench.nim
index 86bfc7821..92489e510 100644
--- a/nbench/nbench.nim
+++ b/nbench/nbench.nim
@@ -70,8 +70,9 @@ proc main() =
       runProcessAttesterSlashing(
         scenario.scenarioDir.string,
         scenario.preState,
-        "attester_slashing" # Pending https://github.com/status-im/nim-confutils/issues/11
+        "attester_slashing", # Pending https://github.com/status-im/nim-confutils/issues/11
         # scenario.attesterSlashing
+        scenario.skipBLS
       )
     of catAttestations:
       runProcessAttestation(
diff --git a/nbench/scenarios.nim b/nbench/scenarios.nim
index 3f5bd4e8c..855ea8c31 100644
--- a/nbench/scenarios.nim
+++ b/nbench/scenarios.nim
@@ -131,7 +131,7 @@ proc parseSSZ(path: string, T: typedesc): T =
     stderr.write "SSZ load issue for file \"", path, "\"\n"
     stderr.write err.formatMsg(path), "\n"
     quit 1
-  except CatchableError as err:
+  except CatchableError:
     writeStackTrace()
     stderr.write "SSZ load issue for file \"", path, "\"\n"
     quit 1
@@ -219,7 +219,7 @@ template processBlockScenarioImpl(
   elif needFlags:
     let success = transitionFn(state[], consObj[], flags)
   elif needCache:
-    let success = transitionFn(state[], consObj[], cache)
+    let success = transitionFn(state[], consObj[], flags, cache)
   else:
     let success = transitionFn(state[], consObj[])
 
@@ -242,6 +242,6 @@ genProcessEpochScenario(runProcessFinalUpdates, process_final_updates, needCache
 genProcessBlockScenario(runProcessBlockHeader, process_block_header, block_header, BeaconBlock, needFlags = true, needCache = true)
 genProcessBlockScenario(runProcessProposerSlashing, process_proposer_slashing, proposer_slashing, ProposerSlashing, needFlags = true, needCache = true)
 genProcessBlockScenario(runProcessAttestation, process_attestation, attestation, Attestation, needFlags = true, needCache = true)
-genProcessBlockScenario(runProcessAttesterSlashing, process_attester_slashing, att_slash, AttesterSlashing, needFlags = false, needCache = true)
+genProcessBlockScenario(runProcessAttesterSlashing, process_attester_slashing, att_slash, AttesterSlashing, needFlags = true, needCache = true)
 genProcessBlockScenario(runProcessDeposit, process_deposit, deposit, Deposit, needFlags = true, needCache = false)
 genProcessBlockScenario(runProcessVoluntaryExits, process_voluntary_exit, deposit, SignedVoluntaryExit, needFlags = true, needCache = false)