diff --git a/core/block_validator.go b/core/block_validator.go
index 142bdc2839..4fecfb9a2c 100644
--- a/core/block_validator.go
+++ b/core/block_validator.go
@@ -130,16 +130,10 @@ func (v *BlockValidator) ValidateState(block *types.Block, statedb *state.StateD
 	header := block.Header()
 	// When ParallelTxGroupingByStorageOverlap is enabled, Process may still differ
 	// from the block builder in edge cases; skip strict gas equality in that mode.
-	if !ParallelTxGroupingByStorageOverlap {
-		if block.GasUsed() != res.GasUsed {
-			return fmt.Errorf("invalid gas used (remote: %d local: %d)", block.GasUsed(), res.GasUsed)
-		}
-	} else {
-		// print warning without returning an error
-		if block.GasUsed() != res.GasUsed {
-			fmt.Printf("expected error: invalid gas used (remote: %d local: %d)\n", block.GasUsed(), res.GasUsed)
-		}
+	if block.GasUsed() != res.GasUsed {
+		return fmt.Errorf("invalid gas used (remote: %d local: %d)", block.GasUsed(), res.GasUsed)
 	}
+
 	// Validate the received block's bloom with the one derived from the generated receipts.
 	// For valid blocks this should always validate to true.
 	//