diff --git a/sort_test.go b/sort_test.go
index 15008e6..abb5a6c 100644
--- a/sort_test.go
+++ b/sort_test.go
@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 package todotxt
 
 import (
diff --git a/task_test.go b/task_test.go
index 1df32ac..e167cbd 100644
--- a/task_test.go
+++ b/task_test.go
@@ -1,3 +1,7 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
 package todotxt
 
 import (