diff --git a/cloud/lib/sinbin/sinbin_test.go b/cloud/lib/sinbin/sinbin_test.go
index 7403bb1..715ac94 100644
--- a/cloud/lib/sinbin/sinbin_test.go
+++ b/cloud/lib/sinbin/sinbin_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package sinbin
 
 import (