diff --git a/libs/cardano-ledger-test/bench/Bench/Cardano/Ledger/ApplyTx.hs b/libs/cardano-ledger-test/bench/Bench/Cardano/Ledger/ApplyTx.hs
index d58a4e2caa9..bb8d326480c 100644
--- a/libs/cardano-ledger-test/bench/Bench/Cardano/Ledger/ApplyTx.hs
+++ b/libs/cardano-ledger-test/bench/Bench/Cardano/Ledger/ApplyTx.hs
@@ -1,9 +1,12 @@
+{-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE GADTs #-}
 {-# LANGUAGE MonoLocalBinds #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE StrictData #-}
 {-# LANGUAGE TypeApplications #-}
@@ -13,9 +16,11 @@
 -- | Benchmarks for transaction application
 module Bench.Cardano.Ledger.ApplyTx (applyTxBenchmarks) where
 
+import Bench.Cardano.Ledger.ApplyTx.Gen (generateForEra)
 import Cardano.Binary
 import Cardano.Ledger.Allegra (AllegraEra)
 import Cardano.Ledger.Alonzo (AlonzoEra)
+import Cardano.Ledger.Alonzo.Rules.Ledger ()
 import qualified Cardano.Ledger.Core as Core
 import Cardano.Ledger.Era (Era, ValidateScript)
 import Cardano.Ledger.Mary (MaryEra)
@@ -28,12 +33,16 @@ import Cardano.Ledger.Shelley.API
     LedgerEnv (..),
     MempoolEnv,
     MempoolState,
+    ShelleyBasedEra,
     Tx,
     applyTxsTransition,
   )
 import Cardano.Ledger.Shelley.LedgerState (DPState, UTxOState)
+import Cardano.Ledger.Shelley.PParams (PParams' (..))
 import Cardano.Ledger.Slot (SlotNo (SlotNo))
 import Control.DeepSeq (NFData (..))
+import Control.State.Transition (State)
+import Control.State.Transition.Trace.Generator.QuickCheck (BaseEnv, HasTrace)
 import Criterion
 import qualified Data.ByteString.Lazy as BSL
 import Data.Default.Class (Default, def)
@@ -42,7 +51,11 @@ import qualified Data.Sequence as Seq
 import Data.Sharing (fromNotSharedCBOR)
 import Data.Typeable (typeRep)
 import GHC.Generics (Generic)
+import Test.Cardano.Ledger.Alonzo.AlonzoEraGen ()
+import Test.Cardano.Ledger.MaryEraGen ()
 import Test.Cardano.Ledger.Shelley.ConcreteCryptoTypes (C_Crypto)
+import Test.Cardano.Ledger.Shelley.Generator.Core (GenEnv)
+import Test.Cardano.Ledger.Shelley.Generator.EraGen (EraGen)
 import Test.Cardano.Ledger.Shelley.Utils (testGlobals)
 
 type ShelleyBench = ShelleyEra C_Crypto
@@ -66,7 +79,7 @@ type AlonzoBench = AlonzoEra C_Crypto
 applyTxMempoolEnv :: Default (Core.PParams era) => MempoolEnv era
 applyTxMempoolEnv =
   LedgerEnv
-    { ledgerSlotNo = SlotNo 71,
+    { ledgerSlotNo = SlotNo 0,
       ledgerIx = 0,
       ledgerPp = def,
       ledgerAccount = AccountState (Coin 45000000000) (Coin 45000000000)
@@ -83,42 +96,35 @@ data ApplyTxRes era = ApplyTxRes
 instance NFData (ApplyTxRes era) where
   rnf (ApplyTxRes g me s t) = seq g (seq me (seq s (seq t ())))
 
-resource_n_ledgerstate :: Int -> FilePath
-resource_n_ledgerstate n = "bench/resources/" <> show n <> "_ledgerstate.cbor"
+--------------------------------------------------------------------------------
+-- Fixed generators
+--------------------------------------------------------------------------------
 
-resource_n_tx :: Int -> FilePath
-resource_n_tx n = "bench/resources/" <> show n <> "_tx.cbor"
+benchmarkSeed :: Int
+benchmarkSeed = 24601
 
--- | Apply the transaction as if it's a transaction from a given era.
-applyTxEra ::
+benchApplyTx ::
   forall era.
   ( Era era,
+    EraGen era,
     ApplyTx era,
-    Default (Core.PParams era),
-    FromCBOR (MempoolState era)
+    ShelleyBasedEra era,
+    HasTrace (Core.EraRule "LEDGER" era) (GenEnv era),
+    BaseEnv (Core.EraRule "LEDGER" era) ~ Globals,
+    Default (State (Core.EraRule "PPUP" era))
   ) =>
   Proxy era ->
-  FilePath ->
-  FilePath ->
   Benchmark
-applyTxEra p lsFile txFile = env loadRes go
+benchApplyTx p = env genRes go
   where
-    loadRes :: IO (ApplyTxRes era)
-    loadRes = do
-      state <-
-        either (\err -> error $ "Failed to decode state: " <> show err) id
-          . decodeFullDecoder "state" fromCBOR
-          <$> BSL.readFile lsFile
-      tx <-
-        either (\err -> error $ "Failed to decode tx: " <> show err) id
-          . decodeAnnotator "tx" fromCBOR
-          <$> BSL.readFile txFile
+    genRes = do
+      (state, tx) <- pure $ generateForEra p benchmarkSeed
       pure $! ApplyTxRes testGlobals applyTxMempoolEnv state tx
     go :: ApplyTxRes era -> Benchmark
     go ~ApplyTxRes {atrGlobals, atrMempoolEnv, atrState, atrTx} =
       bench (show $ typeRep p) $
         whnf
-          ( either (error . show) id
+          ( either (error . show) (\(x, y) -> x `seq` y `seq` (x, y))
               . applyTxsTransition @era @(Either _)
                 atrGlobals
                 atrMempoolEnv
@@ -126,23 +132,12 @@ applyTxEra p lsFile txFile = env loadRes go
           )
           atrState
 
-applyTxGroup :: Benchmark
-applyTxGroup =
-  bgroup
-    "Apply Shelley Tx"
-    [ withRes 0,
-      withRes 1
-    ]
-  where
-    withRes n =
-      let ls = resource_n_ledgerstate n
-          tx = resource_n_tx n
-       in bgroup
-            (show n)
-            [ applyTxEra (Proxy @ShelleyBench) ls tx,
-              applyTxEra (Proxy @AllegraBench) ls tx,
-              applyTxEra (Proxy @MaryBench) ls tx
-            ]
+--------------------------------------------------------------------------------
+-- Deserialising resources from disk
+--------------------------------------------------------------------------------
+
+resource_n_tx :: Int -> FilePath
+resource_n_tx n = "bench/resources/" <> show n <> "_tx.cbor"
 
 -- | Benchmark deserialising a shelley transaction as if it comes from the given
 -- era.
@@ -163,11 +158,21 @@ deserialiseTxEra p =
         . decodeAnnotator "tx" fromCBOR
         <$> BSL.readFile (resource_n_tx 0)
 
+--------------------------------------------------------------------------------
+-- Benchmark suite
+--------------------------------------------------------------------------------
+
 applyTxBenchmarks :: Benchmark
 applyTxBenchmarks =
   bgroup
     "applyTxBenchmarks"
-    [ applyTxGroup,
+    [ bgroup
+        "ApplyTxInEra"
+        [ benchApplyTx (Proxy @ShelleyBench),
+          benchApplyTx (Proxy @AllegraBench),
+          benchApplyTx (Proxy @MaryBench)
+          -- benchApplyTx (Proxy @AlonzoBench)
+        ],
       bgroup
         "Deserialise Shelley Tx"
         [ deserialiseTxEra (Proxy @ShelleyBench),
diff --git a/libs/cardano-ledger-test/bench/Bench/Cardano/Ledger/ApplyTx/Gen.hs b/libs/cardano-ledger-test/bench/Bench/Cardano/Ledger/ApplyTx/Gen.hs
new file mode 100644
index 00000000000..4154f2f37d8
--- /dev/null
+++ b/libs/cardano-ledger-test/bench/Bench/Cardano/Ledger/ApplyTx/Gen.hs
@@ -0,0 +1,57 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE GADTs #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TypeApplications #-}
+
+-- | Generates fixed transaction/state pairs for benchmarking.
+module Bench.Cardano.Ledger.ApplyTx.Gen (generateForEra) where
+
+import Cardano.Ledger.Core (EraRule)
+import qualified Cardano.Ledger.Core as Core
+import Cardano.Ledger.Era (Crypto)
+import Cardano.Ledger.Shelley.API (Globals, ShelleyBasedEra)
+import Cardano.Ledger.Shelley.LedgerState (DPState, UTxOState)
+import Control.State.Transition (State)
+import Control.State.Transition.Trace
+import Control.State.Transition.Trace.Generator.QuickCheck
+import Data.Default.Class (Default)
+import Data.Proxy
+import Test.Cardano.Ledger.AllegraEraGen ()
+import Test.Cardano.Ledger.Shelley.Generator.Core (GenEnv)
+import Test.Cardano.Ledger.Shelley.Generator.EraGen (EraGen)
+import Test.Cardano.Ledger.Shelley.Generator.Presets
+import Test.Cardano.Ledger.Shelley.Generator.ShelleyEraGen ()
+import Test.Cardano.Ledger.Shelley.Generator.Trace.Ledger (mkGenesisLedgerState)
+import Test.Cardano.Ledger.Shelley.Utils (testGlobals)
+import Test.QuickCheck.Gen (unGen)
+import Test.QuickCheck.Random (mkQCGen)
+
+-- | Generate a ledger state and transaction in a given era, given a seed.
+generateForEra ::
+  forall era.
+  ( EraGen era,
+    HasTrace (EraRule "LEDGER" era) (GenEnv era),
+    Default (State (EraRule "PPUP" era)),
+    BaseEnv (EraRule "LEDGER" era) ~ Globals,
+    ShelleyBasedEra era
+  ) =>
+  Proxy era ->
+  Int ->
+  ((UTxOState era, DPState (Crypto era)), Core.Tx era)
+generateForEra eraProxy seed =
+  let ge = genEnv eraProxy
+      qcSeed = mkQCGen seed
+      tr =
+        unGen
+          ( traceFromInitState
+              @(EraRule "LEDGER" era)
+              testGlobals
+              20
+              ge
+              (Just $ mkGenesisLedgerState ge)
+          )
+          qcSeed
+          30
+      sst = last $ sourceSignalTargets tr
+   in (source sst, signal sst)
diff --git a/libs/cardano-ledger-test/bench/resources/DESCRIPTION.md b/libs/cardano-ledger-test/bench/resources/DESCRIPTION.md
index cb462bd0254..99fdef9343f 100644
--- a/libs/cardano-ledger-test/bench/resources/DESCRIPTION.md
+++ b/libs/cardano-ledger-test/bench/resources/DESCRIPTION.md
@@ -40,3 +40,37 @@ let sst = last $ sourceSignalTargets tr
 BS.writeFile "/tmp/0_ledgerstate.cbor" $ serialize' (source sst)
 BS.writeFile "/tmp/0_tx.cbor" $ serialize' (signal sst)
 ```
+```
+:set -XTypeApplications
+
+import Data.Proxy
+
+import Cardano.Binary
+import Control.State.Transition.Trace
+import Control.State.Transition.Trace.Generator.QuickCheck
+import qualified Data.ByteString as BS
+import Cardano.Ledger.Shelley.Rules.Ledger
+import Cardano.Ledger.Shelley
+import Test.Cardano.Ledger.Shelley.ConcreteCryptoTypes
+
+import Test.Cardano.Ledger.Shelley.Utils
+import Test.Cardano.Ledger.Shelley.Generator.Presets
+import Test.Cardano.Ledger.Shelley.Generator.Trace.Ledger ()
+import Test.Cardano.Ledger.Shelley.Generator.ShelleyEraGen ()
+import Cardano.Ledger.Shelley.PParams (PParams'(..))
+import Test.QuickCheck (generate)
+
+import Test.Cardano.Ledger.Shelley.Generator.Trace.Ledger
+
+import Cardano.Ledger.Allegra
+import Test.Cardano.Ledger.AllegraEraGen ()
+
+
+let ge = genEnv (Proxy @(AllegraEra C_Crypto))
+initLs <- generate $ mkGenesisLedgerState @([LedgerPredicateFailure (AllegraEra C_Crypto)]) ge undefined
+tr <- generate $ traceFromInitState @(LEDGER (AllegraEra C_Crypto)) testGlobals 20 ge (Just $ \_ -> pure initLs)
+
+let sst = last $ sourceSignalTargets tr
+BS.writeFile "/tmp/0_ledgerstate.cbor" $ serialize' (source sst)
+BS.writeFile "/tmp/0_tx.cbor" $ serialize' (signal sst)
+```
diff --git a/libs/cardano-ledger-test/cardano-ledger-test.cabal b/libs/cardano-ledger-test/cardano-ledger-test.cabal
index 56ffb3e9771..3671e9032db 100644
--- a/libs/cardano-ledger-test/cardano-ledger-test.cabal
+++ b/libs/cardano-ledger-test/cardano-ledger-test.cabal
@@ -91,7 +91,7 @@ test-suite cardano-ledger-test
     cardano-ledger-test,
     cardano-ledger-shelley-test,
     tasty,
-   
+
 
 
 benchmark bench
@@ -103,6 +103,7 @@ benchmark bench
   main-is:          Main.hs
   other-modules:
     Bench.Cardano.Ledger.ApplyTx
+    Bench.Cardano.Ledger.ApplyTx.Gen
     Bench.Cardano.Ledger.EpochBoundary
     Bench.Cardano.Ledger.Serialisation.Generators
   build-depends:
@@ -110,6 +111,7 @@ benchmark bench
     cardano-binary,
     cardano-crypto-class,
     cardano-ledger-alonzo,
+    cardano-ledger-alonzo-test,
     cardano-ledger-core,
     cardano-ledger-shelley-ma-test,
     cardano-ledger-shelley-ma,
@@ -121,6 +123,7 @@ benchmark bench
     cardano-ledger-shelley,
     cardano-ledger-shelley-test,
     small-steps,
+    small-steps-test
   ghc-options:
       -threaded
       -rtsopts