diff --git a/core/vm/contracts_test.go b/core/vm/contracts_test.go
index 30d9b49f7..aa8d2f1eb 100644
--- a/core/vm/contracts_test.go
+++ b/core/vm/contracts_test.go
@@ -185,7 +185,7 @@ func benchmarkPrecompiled(addr string, test precompiledTest, bench *testing.B) {
 			return
 		}
 		if common.Bytes2Hex(res) != test.Expected {
-			bench.Error(fmt.Sprintf("Expected %v, got %v", test.Expected, common.Bytes2Hex(res)))
+			bench.Errorf("Expected %v, got %v", test.Expected, common.Bytes2Hex(res))
 			return
 		}
 	})