diff --git a/osbase/bringup/test/main_error.go b/osbase/bringup/test/main_error.go
index f632c1b..d94187e 100644
--- a/osbase/bringup/test/main_error.go
+++ b/osbase/bringup/test/main_error.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (