diff --git a/core/headerchain_test.go b/core/headerchain_test.go
index b51fb8f226..99db578638 100644
--- a/core/headerchain_test.go
+++ b/core/headerchain_test.go
@@ -1,3 +1,6 @@
+
+
+
 // Copyright 2020 The go-ethereum Authors
 // This file is part of the go-ethereum library.
 //