diff --git a/core/vm/contracts_test.go b/core/vm/contracts_test.go
index 1a03f93fc2..22fe467c3f 100644
--- a/core/vm/contracts_test.go
+++ b/core/vm/contracts_test.go
@@ -618,7 +618,7 @@ 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
 		}
 	})