diff --git a/cardano-testnet/test/cardano-testnet-test/Cardano/Testnet/Test/Gov/UpdatePParam.hs b/cardano-testnet/test/cardano-testnet-test/Cardano/Testnet/Test/Gov/UpdatePParam.hs
new file mode 100644
index 00000000000..6249915ab6b
--- /dev/null
+++ b/cardano-testnet/test/cardano-testnet-test/Cardano/Testnet/Test/Gov/UpdatePParam.hs
@@ -0,0 +1,285 @@
+{-# LANGUAGE BangPatterns #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE NumericUnderscores #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TypeApplications #-}
+
+module Cardano.Testnet.Test.Gov.UpdatePParam
+  ( hprop_update_pparam
+  ) where
+
+import           Cardano.Api as Api
+import           Cardano.Api.Ledger (EpochInterval (..))
+import qualified Cardano.Api.Ledger as L
+
+import qualified Cardano.Crypto.Hash as L
+import qualified Cardano.Ledger.Conway.Governance as L
+import qualified Cardano.Ledger.Conway.Governance as Ledger
+import qualified Cardano.Ledger.Conway.PParams as L
+import qualified Cardano.Ledger.Core as L
+import qualified Cardano.Ledger.Shelley.LedgerState as L
+import           Cardano.Testnet
+
+import           Prelude
+
+import           Control.Monad
+import           Control.Monad.State.Strict (StateT)
+import           Data.Aeson.Encode.Pretty (encodePretty)
+import           Data.Bifunctor (first)
+import qualified Data.Map.Strict as Map
+import           Data.Maybe
+import           Data.Maybe.Strict
+import           Data.String
+import qualified Data.Text as Text
+import           Data.Word
+import           GHC.Exts (IsList (..))
+import           Lens.Micro
+import           System.FilePath ((</>))
+
+import           Testnet.Components.Configuration
+import           Testnet.Components.DRep (createVotingTxBody, generateVoteFiles,
+                   retrieveTransactionId, signTx, submitTx)
+import           Testnet.Components.Query
+import           Testnet.Components.TestWatchdog
+import           Testnet.Defaults
+import qualified Testnet.Process.Cli as P
+import qualified Testnet.Process.Run as H
+import qualified Testnet.Property.Util as H
+import           Testnet.Types
+
+import           Hedgehog
+import qualified Hedgehog.Extras as H
+
+-- | Execute me with:
+-- @DISABLE_RETRIES=1 cabal test cardano-testnet-test --test-options '-p "/Propose And Ratify New Constitution/"'@
+hprop_update_pparam :: Property
+hprop_update_pparam = H.integrationWorkspace "propose-new-constitution" $ \tempAbsBasePath' -> runWithDefaultWatchdog_ $ do
+  -- Start a local test net
+  conf@Conf { tempAbsPath } <- mkConf tempAbsBasePath'
+  let tempAbsPath' = unTmpAbsPath tempAbsPath
+      tempBaseAbsPath = makeTmpBaseAbsPath tempAbsPath
+
+  work <- H.createDirectoryIfMissing $ tempAbsPath' </> "work"
+
+  -- Generate model for votes
+  let allVotes :: [(String, Int)]
+      allVotes = zip (concatMap (uncurry replicate) [(4, "yes"), (3, "no"), (2, "abstain")]) [1..]
+  annotateShow allVotes
+
+  let numVotes :: Int
+      numVotes = length allVotes
+  annotateShow numVotes
+
+  guardRailScript <- H.note $ work </> "guard-rail-script.plutusV3"
+  H.writeFile guardRailScript $ Text.unpack plutusV3NonSpendingScript
+
+  -- TODO: Update help text for policyid. The script hash is not
+  -- only useful for minting scripts
+  -- TODO: Left off here. Use offline execConfig function
+  constitutionScriptHash <- filter (/= '\n') <$>
+    H.execCli' execConfig
+      [ anyEraToString cEra, "transaction"
+      , "policyid"
+      , "--script-file", guardRailScript
+      ]
+
+  H.note_ $ "Constitution script hash: " <> constitutionScriptHash
+
+  let ceo = ConwayEraOnwardsConway
+      sbe = conwayEraOnwardsToShelleyBasedEra ceo
+      era = toCardanoEra sbe
+      cEra = AnyCardanoEra era
+      fastTestnetOptions = cardanoDefaultTestnetOptions
+        { cardanoEpochLength = 100
+        , cardanoNodeEra = cEra
+        , cardanoNumDReps = numVotes
+        }
+      constitution = undefined
+
+  alonzoGenesis <- evalEither $ first prettyError defaultAlonzoGenesis
+  (startTime, shelleyGenesis') <- getDefaultShelleyGenesis fastTestnetOptions
+  let conwayGenesisWithCommittee =
+        defaultConwayGenesis { L.cgConstitution = constitution }
+
+  TestnetRuntime
+    { testnetMagic
+    , poolNodes
+    , wallets=wallet0:_wallet1:_
+    , configurationFile
+    } <- cardanoTestnet
+           fastTestnetOptions
+           conf startTime shelleyGenesis'
+           alonzoGenesis conwayGenesisWithCommittee
+
+  PoolNode{poolRuntime} <- H.headM poolNodes
+  poolSprocket1 <- H.noteShow $ nodeSprocket poolRuntime
+  execConfig <- H.mkExecConfig tempBaseAbsPath poolSprocket1 testnetMagic
+  let socketPath = nodeSocketPath poolRuntime
+
+  epochStateView <- getEpochStateView configurationFile socketPath
+
+  H.note_ $ "Sprocket: " <> show poolSprocket1
+  H.note_ $ "Abs path: " <> tempAbsBasePath'
+  H.note_ $ "Socketpath: " <> unFile socketPath
+  H.note_ $ "Foldblocks config file: " <> unFile configurationFile
+  gov <- H.createDirectoryIfMissing $ work </> "governance"
+
+  proposalAnchorFile <- H.note $ gov </> "sample-proposal-anchor"
+  H.writeFile proposalAnchorFile "dummy anchor data"
+
+  proposalAnchorDataHash <- H.execCli' execConfig
+    [ "conway", "governance"
+    , "hash", "anchor-data", "--file-text", proposalAnchorFile
+    ]
+
+  let stakeVkeyFp = gov </> "stake.vkey"
+      stakeSKeyFp = gov </> "stake.skey"
+
+  P.cliStakeAddressKeyGen
+    $ KeyPair { verificationKey = File stakeVkeyFp
+              , signingKey = File stakeSKeyFp
+              }
+
+  -- Attempt a protocol parameters update (witnessed with guard rail script)
+  let newCommitteeTermLength = 1000
+  pparamsUpdateFp <- H.note $ work </> "protocol-parameters-upate.action"
+  void $ H.execCli' execConfig
+    [ anyEraToString cEra, "governance", "action", "create-protocol-parameters-update"
+    , "--testnet"
+    , "--governance-action-deposit", show @Int 2_000_000 -- TODO: retrieve this from conway genesis.
+    , "--deposit-return-stake-verification-key-file", stakeVkeyFp
+    , "--anchor-url", "https://tinyurl.com/3wrwb2as"
+    , "--anchor-data-hash", proposalAnchorDataHash
+    , "--constitution-script-hash", constitutionScriptHash
+    , "--committee-term-length", show @Word32 newCommitteeTermLength
+    , "--out-file", pparamsUpdateFp
+    ]
+
+  updateProposalTxBody <- H.note $ work </> "update-proposal.txbody"
+  txin4 <- findLargestUtxoForPaymentKey epochStateView sbe wallet0
+  utxo <- findAllUtxos epochStateView sbe
+
+  let utxoJSON1 = encodePretty utxo
+  H.lbsWriteFile (work </> "utxo1.json") utxoJSON1
+  H.noteShow_ (work </> "utxo1.json")
+
+  let relevantValue = fromMaybe mempty ((\(TxOut _ txVal _ _) -> txOutValueToValue txVal) <$> Map.lookup txin4 utxo)
+      adaAtInput = L.unCoin $ selectLovelace relevantValue
+
+
+  H.noteShow_ adaAtInput
+  protocolParametersFile <- H.note $ work </> "protocol-parameters.json"
+  void $ H.execCli' execConfig
+    [ anyEraToString cEra, "query", "protocol-parameters"
+    , "--out-file", protocolParametersFile
+    ]
+
+  utxo2 <- findAllUtxos epochStateView sbe
+  let utxoJSON2 = encodePretty utxo2
+  H.lbsWriteFile (work </> "utxo2.json") utxoJSON2
+  H.noteShow_ (work </> "utxo2.json")
+
+  void $ H.execCli' execConfig
+    [ anyEraToString cEra, "transaction", "build-estimate"
+    , "--shelley-key-witnesses", show @Int 1
+    , "--total-utxo-value", show @Integer adaAtInput
+    , "--change-address", Text.unpack $ paymentKeyInfoAddr wallet0
+    , "--protocol-params-file", protocolParametersFile
+    , "--tx-in", Text.unpack $ renderTxIn txin4
+    , "--tx-in-collateral", Text.unpack $ renderTxIn txin4
+    , "--tx-out", Text.unpack (paymentKeyInfoAddr wallet0) <> "+" <> show @Int 3_000_001
+    , "--proposal-file", pparamsUpdateFp
+    , "--proposal-script-file", guardRailScript
+    , "--proposal-redeemer-value", "0"
+    , "--proposal-execution-units", "(2000000,20000000)"
+    , "--out-file", updateProposalTxBody
+    ]
+
+  updateProposalTx <- H.note $ work </> "update-proposal.tx"
+
+  signedPParamsProposalTx <- signTx execConfig cEra work updateProposalTx
+                               (File updateProposalTxBody) [SomeKeyPair $ paymentKeyInfoPair wallet0]
+
+
+  void $ H.execCli' execConfig
+    [ "conway", "transaction", "submit"
+    , "--tx-file", unFile signedPParamsProposalTx
+    ]
+
+  -- Need to vote on proposal. Drep threshold must be met
+  governanceActionTxIdPParamUpdate <- retrieveTransactionId execConfig signedPParamsProposalTx
+
+  !pparamsPropSubmittedResult
+   <- H.leftFailM $ findCondition
+        (maybeExtractGovernanceActionIndex (fromString governanceActionTxIdPParamUpdate))
+        configurationFile
+        socketPath
+        (EpochNo 5)
+
+  governanceActionIndexPParams <- H.nothingFail pparamsPropSubmittedResult
+
+  -- Proposal was successfully submitted, now we vote on the proposal and confirm it was ratified
+  pparamsVoteFiles <- generateVoteFiles execConfig work "pparams-update-vote-files"
+                        governanceActionTxIdPParamUpdate governanceActionIndexPParams
+                        [(defaultDRepKeyPair idx, vote) | (vote, idx) <- allVotes]
+
+  -- Submit votes
+  pparamsVoteTxBodyFp <- createVotingTxBody execConfig epochStateView sbe work "pparams-vote-tx-body"
+                           pparamsVoteFiles wallet0
+
+
+  pparamsVoteTxFp <- signTx execConfig cEra work "signed-vote-tx" pparamsVoteTxBodyFp signingKeys
+  submitTx execConfig cEra pparamsVoteTxFp
+
+  mPParamsUpdate
+    <- H.leftFailM $ findCondition
+         (checkPParamsUpdated (EpochInterval newCommitteeTermLength))
+         configurationFile socketPath (EpochNo 10)
+
+  H.nothingFail mPParamsUpdate
+
+checkPParamsUpdated
+  :: EpochInterval -- ^ The epoch interval to check for in the updated protocol parameters
+  -> AnyNewEpochState
+  -> Maybe ()
+checkPParamsUpdated committeeTermLength (AnyNewEpochState sbe nes) =
+  let curCommTermLength :: EpochInterval
+      curCommTermLength = caseShelleyToBabbageOrConwayEraOnwards
+                            (const $ error "Committee max term length only exists in Conway era onwards")
+                            (const $ nes ^. L.newEpochStateGovStateL . L.cgsCurPParamsL . L.ppCommitteeMaxTermLengthL)
+                            sbe
+  in if curCommTermLength == committeeTermLength
+     then Just () -- PParams was successfully updated and we terminate the fold.
+     else Nothing -- PParams was not updated yet, we continue the fold.
+
+checkConstitutionWasRatified
+  :: String -- submitted constitution hash
+  -> String -- submitted guard rail script hash
+  -> AnyNewEpochState
+  -> StateT s IO LedgerStateCondition -- ^ Accumulator at block i and fold status
+checkConstitutionWasRatified submittedConstitutionHash submittedGuardRailScriptHash anyNewEpochState =
+  if filterRatificationState submittedConstitutionHash submittedGuardRailScriptHash anyNewEpochState
+  then return ConditionMet
+  else return ConditionNotMet
+
+filterRatificationState
+  :: String -- ^ Submitted constitution anchor hash
+  -> String -- ^ Submitted guard rail script hash
+  -> AnyNewEpochState
+  -> Bool
+filterRatificationState c guardRailScriptHash (AnyNewEpochState sbe newEpochState) = do
+  caseShelleyToBabbageOrConwayEraOnwards
+    (const $ error "filterRatificationState: Only conway era supported")
+
+    (const $ do
+      -- This is the next ratify state! Not the current constitution!!!
+      let constitution = newEpochState ^. L.newEpochStateGovStateL . L.cgsConstitutionL
+          constitutionAnchorHash = Ledger.anchorDataHash $ Ledger.constitutionAnchor constitution
+          L.ScriptHash constitutionScriptHash = fromMaybe (error "filterRatificationState: consitution does not have a guardrail script")
+                                                $ strictMaybeToMaybe $ constitution ^. Ledger.constitutionScriptL
+      Text.pack c == renderSafeHashAsHex constitutionAnchorHash && L.hashToTextAsHex constitutionScriptHash == Text.pack guardRailScriptHash
+
+    )
+    sbe
+