diff --git a/docker/chain/genesis.json b/docker/chain/genesis.json
index aa79bf5..4500d14 100644
--- a/docker/chain/genesis.json
+++ b/docker/chain/genesis.json
@@ -20,7 +20,7 @@
   "nonce": "0x0",
   "timestamp": "0x0",
   "extraData": "0x",
-  "gasLimit": "0x1c9c380",
+  "gasLimit": "0x1c9c38000",
   "difficulty": "0x0",
   "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
   "coinbase": "0x0000000000000000000000000000000000000000",
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index c8d0ad7..d531618 100755
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -47,7 +47,13 @@ services:
           --http --http.addr 0.0.0.0 --http.port 8545 \
           --http.api "eth,net,web3,txpool" \
           --disable-discovery \
-          -vvvv
+          --txpool.pending-max-count 200000 \
+          --txpool.pending-max-size 200 \
+          --txpool.queued-max-count 200000 \
+          --txpool.queued-max-size 200 \
+          --txpool.max-account-slots 2048 \
+          --txpool.max-new-txns 2048 \
+          --txpool.additional-validation-tasks 16
 
 volumes:
   logs:
diff --git a/execution_test.go b/execution_test.go
index e6a8e3b..338006e 100644
--- a/execution_test.go
+++ b/execution_test.go
@@ -26,7 +26,7 @@ const (
 	TEST_ENGINE_URL = "http://localhost:8551"
 
 	CHAIN_ID          = "1234"
-	GENESIS_HASH      = "0x568201e3a763b59f7c646d72bf75a25aafff57f98a82dbd7b50542382c55f372"
+	GENESIS_HASH      = "0x0a962a0d163416829894c89cb604ae422323bcdf02d7ea08b94d68d3e026a380"
 	GENESIS_STATEROOT = "0x362b7d8a31e7671b0f357756221ac385790c25a27ab222dc8cbdd08944f5aea4"
 	TEST_PRIVATE_KEY  = "cece4f25ac74deb1468965160c7185e07dff413f23fcadb611b05ca37ab0a52e"
 	TEST_TO_ADDRESS   = "0x944fDcD1c868E3cC566C78023CcB38A32cDA836E"
@@ -105,7 +105,7 @@ func TestEngineExecution(t *testing.T) {
 
 			payload, err := executionClient.GetTxs(ctx)
 			require.NoError(tt, err)
-			require.Len(tt, payload, nTxs+1)
+			require.Lenf(tt, payload, nTxs+1, "expected %d transactions, got %d", nTxs+1, len(payload))
 
 			allPayloads = append(allPayloads, payload)
 
@@ -137,6 +137,10 @@ func TestEngineExecution(t *testing.T) {
 		}
 	})
 
+	if t.Failed() {
+		return
+	}
+
 	// start new container and try to sync
 	t.Run("Sync chain", func(tt *testing.T) {
 		jwtSecret := setupTestRethEngine(t)
@@ -383,9 +387,16 @@ func TestSubmitTransaction(t *testing.T) {
 	lastNonce, err = rpcClient.NonceAt(ctx, address, new(big.Int).SetUint64(height))
 	require.NoError(t, err)
 
-	for i := 0; i < 10; i++ {
-		tx := getRandomTransaction(t, 22000)
-		submitTransaction(t, tx)
+	for s := 0; s < 30; s++ {
+		startTime := time.Now()
+		for i := 0; i < 5000; i++ {
+			tx := getRandomTransaction(t, 22000)
+			submitTransaction(t, tx)
+		}
+		elapsed := time.Since(startTime)
+		if elapsed < time.Second {
+			time.Sleep(time.Second - elapsed)
+		}
 	}
 }