diff --git a/nimbus/db/aristo/aristo_part/part_chain_rlp.nim b/nimbus/db/aristo/aristo_part/part_chain_rlp.nim
index 893ef980a..4bd4acb05 100644
--- a/nimbus/db/aristo/aristo_part/part_chain_rlp.nim
+++ b/nimbus/db/aristo/aristo_part/part_chain_rlp.nim
@@ -13,7 +13,7 @@
 import
   eth/common,
   results,
-  ".."/[aristo_desc, aristo_get, aristo_utils, aristo_compute, aristo_serialise]
+  ".."/[aristo_desc, aristo_get, aristo_utils, aristo_serialise]
 
 const
   ChainRlpNodesNoEntry* = {
diff --git a/tools/t8n/helpers.nim b/tools/t8n/helpers.nim
index 1c2632312..bb77d7ef6 100644
--- a/tools/t8n/helpers.nim
+++ b/tools/t8n/helpers.nim
@@ -264,7 +264,8 @@ proc parseTxJson(txo: TxObject, chainId: ChainId): Result[Transaction, string] =
     optional(accessList)
     required(authorizationList)
 
-  if tx.chainId != chainId:
+  # Ignore chainId if txType == TxLegacy
+  if tx.txType > TxLegacy and tx.chainId != chainId:
     return err("invalid chain id: have " & $tx.chainId & " want " & $chainId)
 
   let eip155 = txo.protected.get(true)
@@ -285,10 +286,10 @@ proc readNestedTx(rlp: var Rlp, chainId: ChainId): Result[Transaction, string] =
     else:
       var rr = rlpFromBytes(rlp.read(seq[byte]))
       rr.read(Transaction)
-    if tx.chainId == chainId:
-      ok(tx)
-    else:
-      err("invalid chain id: have " & $tx.chainId & " want " & $chainId)
+    # Ignore chainId if txType == TxLegacy
+    if tx.txType > TxLegacy and tx.chainId != chainId:
+      return err("invalid chain id: have " & $tx.chainId & " want " & $chainId)
+    ok(tx)
   except RlpError as exc:
     err(exc.msg)
 
diff --git a/tools/t8n/t8n_test.nim b/tools/t8n/t8n_test.nim
index c49c86635..7840402cd 100644
--- a/tools/t8n/t8n_test.nim
+++ b/tools/t8n/t8n_test.nim
@@ -169,7 +169,7 @@ proc runTest(appDir: string, spec: TestSpec): bool =
 
   if spec.expOut.len > 0:
     if spec.expOut.endsWith(".json"):
-      let path = base / spec.expOut      
+      let path = base / spec.expOut
       try:
         let want = json.parseFile(path)
         let have = json.parseJson(res)
@@ -470,7 +470,7 @@ const
       name  : "Revert In Create In Init Create2",
       base  : "testdata/00-512",
       input : t8nInput(
-        "alloc.json", "txs.rlp", "env.json", "Berlin", "0", "0"
+        "alloc.json", "txs.rlp", "env.json", "Berlin", "0"
       ),
       output: T8nOutput(alloc: true, result: true),
       expOut: "exp.json",
@@ -479,7 +479,7 @@ const
       name  : "Revert In Create In Init",
       base  : "testdata/00-513",
       input : t8nInput(
-        "alloc.json", "txs.rlp", "env.json", "Berlin", "0", "0"
+        "alloc.json", "txs.rlp", "env.json", "Berlin", "0"
       ),
       output: T8nOutput(alloc: true, result: true),
       expOut: "exp.json",
@@ -488,7 +488,7 @@ const
       name  : "Init collision 3",
       base  : "testdata/00-514",
       input : t8nInput(
-        "alloc.json", "txs.rlp", "env.json", "Berlin", "0", "0"
+        "alloc.json", "txs.rlp", "env.json", "Berlin", "0"
       ),
       output: T8nOutput(alloc: true, result: true),
       expOut: "exp.json",
@@ -506,7 +506,7 @@ const
       name  : "GasUsedHigherThanBlockGasLimitButNotWithRefundsSuicideLast_Frontier",
       base  : "testdata/00-516",
       input : t8nInput(
-        "alloc.json", "txs.rlp", "env.json", "Frontier", "5000000000000000000", "0"
+        "alloc.json", "txs.rlp", "env.json", "Frontier", "5000000000000000000"
       ),
       output: T8nOutput(alloc: true, result: true),
       expOut: "exp.json",