diff --git a/src/mocks/ScrollChainMockBlob.sol b/src/mocks/ScrollChainMockBlob.sol
index 3490f06a..89f9d19f 100644
--- a/src/mocks/ScrollChainMockBlob.sol
+++ b/src/mocks/ScrollChainMockBlob.sol
@@ -19,7 +19,7 @@ contract ScrollChainMockBlob is ScrollChain {
         address _messageQueueV2,
         address _verifier,
         address _system
-    ) ScrollChain(_chainId, _messageQueueV1, _messageQueueV2, _verifier, address(_system)) {}
+    ) ScrollChain(_chainId, _messageQueueV1, _messageQueueV2, _verifier, _system) {}
 
     /**********************
      * Internal Functions *
@@ -48,10 +48,6 @@ contract ScrollChainMockBlob is ScrollChain {
         overrideBatchHashCheck = status;
     }
 
-    function _getBlobVersionedHash() internal virtual override returns (bytes32 _blobVersionedHash) {
-        _blobVersionedHash = blobhashes[0];
-    }
-
     function _getBlobVersionedHash(uint256 index) internal virtual override returns (bytes32 _blobVersionedHash) {
         _blobVersionedHash = blobhashes[index];
     }