diff --git a/eras/conway/impl/testlib/Test/Cardano/Ledger/Conway/Imp/RatifySpec.hs b/eras/conway/impl/testlib/Test/Cardano/Ledger/Conway/Imp/RatifySpec.hs
index 679ea826221..7ca32dbfe86 100644
--- a/eras/conway/impl/testlib/Test/Cardano/Ledger/Conway/Imp/RatifySpec.hs
+++ b/eras/conway/impl/testlib/Test/Cardano/Ledger/Conway/Imp/RatifySpec.hs
@@ -198,6 +198,43 @@ spoAndCCVotingSpec = do
         else do
           getLastEnactedParameterChange `shouldReturn` SNothing
           newRefScriptBaseFee `shouldBe` initialRefScriptBaseFee
+    it "Constitution cannot be changed if active committee size is below min size" . whenPostBootstrap $ do
+      modifyPParams $ \pp ->
+        pp
+          & ppDRepVotingThresholdsL . dvtUpdateToConstitutionL .~ (0 %! 1)
+          & ppCommitteeMinSizeL .~ 2
+          & ppCommitteeMaxTermLengthL .~ EpochInterval 50
+      coldCommitteeActive <- KeyHashObj <$> freshKeyHash
+      coldCommitteeInactive <- KeyHashObj <$> freshKeyHash
+      startingEpoch <- getsNES nesELL
+      maxTermLength <- getsPParams ppCommitteeMaxTermLengthL
+      (dRep, _, _) <- setupSingleDRep 1_000_000_000
+      (spo, _, _) <- setupPoolWithStake $ Coin 1_000_000_000
+      let
+        committeeMap =
+          [ (coldCommitteeActive, addEpochInterval startingEpoch maxTermLength)
+          , (coldCommitteeInactive, addEpochInterval startingEpoch $ EpochInterval 5)
+          ]
+      initialCommittee <- getCommitteeMembers
+      committeeActionId <-
+        impAnn "Submit committee update"
+          . submitGovAction
+          $ UpdateCommittee
+            SNothing
+            initialCommittee
+            committeeMap
+            (0 %! 1)
+      submitYesVote_ (DRepVoter dRep) committeeActionId
+      submitYesVote_ (StakePoolVoter spo) committeeActionId
+      passNEpochs 2
+      getCommitteeMembers `shouldReturn` Map.keysSet committeeMap
+      passNEpochs 3
+      newConstitution <- arbitrary
+      constitutionActionId <- submitGovAction $ NewConstitution SNothing newConstitution
+      logRatificationChecks constitutionActionId
+      passNEpochs 2
+      getConstitution `shouldNotReturn` newConstitution
+      True `shouldBe` False
 
 committeeExpiryResignationDiscountSpec ::
   forall era.
diff --git a/libs/cardano-ledger-conformance/test/Test/Cardano/Ledger/Conformance/Imp.hs b/libs/cardano-ledger-conformance/test/Test/Cardano/Ledger/Conformance/Imp.hs
index 768e50b9ac0..05931a7ac8b 100644
--- a/libs/cardano-ledger-conformance/test/Test/Cardano/Ledger/Conformance/Imp.hs
+++ b/libs/cardano-ledger-conformance/test/Test/Cardano/Ledger/Conformance/Imp.hs
@@ -156,6 +156,6 @@ spec =
           -- LEDGER tests pending on the dRep delegations cleanup in the spec:
           -- https://github.com/IntersectMBO/formal-ledger-specifications/issues/635
           xdescribe "LEDGER" Ledger.spec
-          xdescribe "RATIFY" Ratify.spec
+          describe "RATIFY" Ratify.spec
           xdescribe "UTXO" Utxo.spec
           xdescribe "UTXOS" Utxos.spec