diff --git a/go/loader/backdoor.go b/go/loader/backdoor_test.go
similarity index 69%
rename from go/loader/backdoor.go
rename to go/loader/backdoor_test.go
index 1a5803b20b1..816d8ef56aa 100644
--- a/go/loader/backdoor.go
+++ b/go/loader/backdoor_test.go
@@ -1,3 +1,7 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package loader
 
 import (