diff --git a/metropolis/test/launch/swtpm.go b/metropolis/test/launch/swtpm.go
index 5691c86..3c48227 100644
--- a/metropolis/test/launch/swtpm.go
+++ b/metropolis/test/launch/swtpm.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package launch
 
 import (