diff --git a/sdk/daml-lf/model-test-lib/src/main/scala/com/digitalasset/daml/lf/model/test/Demo.scala b/sdk/daml-lf/model-test-lib/src/main/scala/com/digitalasset/daml/lf/model/test/Demo.scala
index b99b3646e0cb..f26a75653923 100644
--- a/sdk/daml-lf/model-test-lib/src/main/scala/com/digitalasset/daml/lf/model/test/Demo.scala
+++ b/sdk/daml-lf/model-test-lib/src/main/scala/com/digitalasset/daml/lf/model/test/Demo.scala
@@ -12,6 +12,8 @@ import org.apache.pekko.actor.ActorSystem
 import org.apache.pekko.stream.Materializer
 import org.scalacheck.{Gen, Prop}
 
+import scala.annotation.nowarn
+
 //import scala.annotation.nowarn
 import scala.concurrent.duration.Duration
 import scala.concurrent.{Await, ExecutionContext}
@@ -87,7 +89,7 @@ object Demo {
 
     // val workers = ExecutionContext.fromExecutorService(Executors.newFixedThreadPool(1))
 
-    // @nowarn("cat=unused")
+    @nowarn("cat=unused")
     val bad = Parser.parseScenario("""
         |Scenario
         |  Topology
@@ -101,8 +103,8 @@ object Demo {
 
     implicit val pretty: Ledgers.Scenario => org.scalacheck.util.Pretty =
       (s: Ledgers.Scenario) => org.scalacheck.util.Pretty(_ => Pretty.prettyScenario(s))
-    // validSymScenarios
-    List(bad)
+    validSymScenarios
+      // List(bad)
       .foreach(scenario => {
         // workers.execute(() =>
         if (scenario.ledger.nonEmpty) {
diff --git a/sdk/daml-script/runner/src/main/scala/com/digitalasset/daml/lf/engine/script/v2/ledgerinteraction/IdeLedgerClient.scala b/sdk/daml-script/runner/src/main/scala/com/digitalasset/daml/lf/engine/script/v2/ledgerinteraction/IdeLedgerClient.scala
index 22a1c8e6bcc3..4bcbeefa3748 100644
--- a/sdk/daml-script/runner/src/main/scala/com/digitalasset/daml/lf/engine/script/v2/ledgerinteraction/IdeLedgerClient.scala
+++ b/sdk/daml-script/runner/src/main/scala/com/digitalasset/daml/lf/engine/script/v2/ledgerinteraction/IdeLedgerClient.scala
@@ -29,6 +29,7 @@ import com.digitalasset.daml.lf.speedy.Speedy.Machine
 import com.digitalasset.daml.lf.speedy.{Pretty, SError, SValue, TraceLog, WarningLog}
 import com.digitalasset.daml.lf.transaction.{
   FatContractInstance,
+  FatContractInstanceImpl,
   GlobalKey,
   IncompleteTransaction,
   Node,
@@ -39,7 +40,6 @@ import com.digitalasset.daml.lf.transaction.{
 import com.digitalasset.daml.lf.value.Value
 import com.digitalasset.daml.lf.value.Value.ContractId
 import com.daml.nonempty.NonEmpty
-
 import com.digitalasset.canton.logging.{LoggingContextWithTrace, NamedLoggerFactory}
 import com.digitalasset.canton.ledger.localstore.InMemoryUserManagementStore
 import scalaz.OneAnd
@@ -119,8 +119,24 @@ class IdeLedgerClient(
   private val userManagementStore =
     new InMemoryUserManagementStore(createAdmin = false, namedLoggerFactory)
 
-  private[this] def blob(contract: FatContractInstance): Bytes =
-    Bytes.fromByteString(TransactionCoder.encodeFatContractInstance(contract).toOption.get)
+  private[this] def blob(contract: FatContractInstance): Bytes = {
+    val valueTranslator =
+      new ValueTranslator(compiledPackages.pkgInterface, requireV1ContractIdSuffix = false)
+    valueTranslator.translateValue(TTyCon(contract.templateId), contract.createArg) match {
+      case Left(_) =>
+        sys.error("blob: translateValue failed")
+      case Right(sArg) =>
+        val normalizedArg = sArg.toNormalizedValue(contract.version)
+        val normalizedContract =
+          contract.asInstanceOf[FatContractInstanceImpl].copy(createArg = normalizedArg)
+        Bytes.fromByteString(
+          TransactionCoder
+            .encodeFatContractInstance(normalizedContract)
+            .toOption
+            .get
+        )
+    }
+  }
 
   private[this] def blob(create: Node.Create, createAt: Time.Timestamp): Bytes =
     blob(FatContractInstance.fromCreateNode(create, createAt, Bytes.Empty))