diff --git a/clients/prysm-bn/prysm_bn.sh b/clients/prysm-bn/prysm_bn.sh
index 88fa21de3a..edbd3a6548 100755
--- a/clients/prysm-bn/prysm_bn.sh
+++ b/clients/prysm-bn/prysm_bn.sh
@@ -73,6 +73,7 @@ echo Starting Prysm Beacon Node
     --jwt-secret=/jwtsecret \
     --min-sync-peers=1 \
     --subscribe-all-subnets=true \
+    --enable-debug-rpc-endpoints=true \
     $metrics_option \
     --deposit-contract="${HIVE_ETH2_CONFIG_DEPOSIT_CONTRACT_ADDRESS:-0x1111111111111111111111111111111111111111}" \
     --contract-deployment-block="${HIVE_ETH2_DEPOSIT_DEPLOY_BLOCK_NUMBER:-0}" \
diff --git a/simulators/ethereum/engine/helper/helper.go b/simulators/ethereum/engine/helper/helper.go
index 9d7a83817e..84271e03cf 100644
--- a/simulators/ethereum/engine/helper/helper.go
+++ b/simulators/ethereum/engine/helper/helper.go
@@ -2,6 +2,7 @@ package helper
 
 import (
 	"context"
+	"strings"
 	"sync"
 	"time"
 
@@ -371,6 +372,13 @@ func MakeTransaction(nonce uint64, recipient *common.Address, gasLimit uint64, a
 	return signedTx, nil
 }
 
+// Determines if the error we got from sending the raw tx is because the client
+// already knew the tx (might happen if we produced a re-org where the tx was
+// unwind back into the txpool)
+func SentTxAlreadyKnown(err error) bool {
+	return strings.Contains(err.Error(), "already known")
+}
+
 func SendNextTransaction(testCtx context.Context, node client.EngineClient, recipient common.Address, amount *big.Int, payload []byte, txType TestTransactionType) (*types.Transaction, error) {
 	nonce, err := node.GetNextAccountNonce(testCtx, globals.VaultAccountAddress)
 	if err != nil {
@@ -383,6 +391,8 @@ func SendNextTransaction(testCtx context.Context, node client.EngineClient, reci
 		err := node.SendTransaction(ctx, tx)
 		if err == nil {
 			return tx, nil
+		} else if SentTxAlreadyKnown(err) {
+			return tx, nil
 		}
 		select {
 		case <-time.After(time.Second):
diff --git a/simulators/ethereum/engine/suites/transition/tests.go b/simulators/ethereum/engine/suites/transition/tests.go
index dd836fc86b..dfe231c779 100644
--- a/simulators/ethereum/engine/suites/transition/tests.go
+++ b/simulators/ethereum/engine/suites/transition/tests.go
@@ -65,6 +65,9 @@ type MergeTestSpec struct {
 	// Chain file to initialize the main client.
 	MainChainFile string
 
+	// Transaction type to use throughout the test
+	TestTransactionType helper.TestTransactionType
+
 	// Introduce PREVRANDAO transactions on the PoS blocks, including transition,
 	// which could overwrite an existing transaction in the PoW chain (if re-org
 	// occurred to a lower-height chain)
@@ -213,6 +216,8 @@ var mergeTestSpecs = []MergeTestSpec{
 		MainChainFile:            "blocks_2_td_393120.rlp",
 		KeepCheckingUntilTimeout: true,
 		PrevRandaoTransactions:   true,
+		// Tx included in the proof-of-work chain is legacy
+		TestTransactionType: helper.LegacyTxOnly,
 		SecondaryClientSpecs: []SecondaryClientSpec{
 			{
 				ClientStarter: hive_rpc.HiveRPCEngineStarter{
@@ -1152,6 +1157,7 @@ func GenerateMergeTestSpec(mergeTestSpec MergeTestSpec) test.Spec {
 		GenesisFile:                     mergeTestSpec.GenesisFile,
 		DisableMining:                   mergeTestSpec.DisableMining,
 		ChainFile:                       mergeTestSpec.MainChainFile,
+		TestTransactionType:             mergeTestSpec.TestTransactionType,
 		SafeSlotsToImportOptimistically: mergeTestSpec.SafeSlotsToImportOptimistically,
 	}
 }