diff --git a/bus-mapping/src/evm/opcodes/extcodesize.rs b/bus-mapping/src/evm/opcodes/extcodesize.rs
index aef99e9946..afaddefef0 100644
--- a/bus-mapping/src/evm/opcodes/extcodesize.rs
+++ b/bus-mapping/src/evm/opcodes/extcodesize.rs
@@ -57,7 +57,15 @@ impl Opcode for Extcodesize {
         let (code_hash, code_size) = if exists {
             (
                 account.code_hash,
-                state.code(account.code_hash)?.len().into(),
+                if cfg!(feature = "scroll") {
+                    debug_assert_eq!(
+                        account.code_size,
+                        state.code(account.code_hash)?.len().into()
+                    );
+                    account.code_size
+                } else {
+                    state.code(account.code_hash)?.len().into()
+                },
             )
         } else {
             (H256::zero(), Word::zero())
diff --git a/eth-types/src/state_db/l2.rs b/eth-types/src/state_db/l2.rs
index 7736188748..e0bab37629 100644
--- a/eth-types/src/state_db/l2.rs
+++ b/eth-types/src/state_db/l2.rs
@@ -116,7 +116,7 @@ impl CodeDB {
                             // bustmapping do this job
                             unreachable!()
                         }
-                        OpcodeId::EXTCODESIZE | OpcodeId::EXTCODECOPY => {
+                        OpcodeId::EXTCODECOPY => {
                             let code = data.get_code_at(0);
                             if code.is_none() {
                                 log::warn!("unable to fetch code from step. {step:?}");
diff --git a/zkevm-circuits/src/witness/mpt.rs b/zkevm-circuits/src/witness/mpt.rs
index eb4b82df65..34abdddb18 100644
--- a/zkevm-circuits/src/witness/mpt.rs
+++ b/zkevm-circuits/src/witness/mpt.rs
@@ -286,21 +286,12 @@ impl MptUpdates {
                 MptUpdate::from_rows(key, rows, i, rows_len, old_root, new_root)
             })
             .collect();
-        let mpt_updates = MptUpdates {
+        MptUpdates {
             old_root,
             new_root,
             updates,
             ..Default::default()
-        };
-        // FIXME: we can remove this assert after the code runs a while and everything is ok?
-        #[cfg(debug_assertions)]
-        {
-            let mut rows = rows.to_vec();
-            rows.sort_by_key(Rw::as_key);
-            let old_updates = Self::from_rws_with_mock_state_roots(&rows, old_root, new_root);
-            assert_eq!(old_updates.updates, mpt_updates.updates);
         }
-        mpt_updates
     }
 
     pub(crate) fn from_rws_with_mock_state_roots(