diff --git a/hlr/HLR_Tests.ttcn b/hlr/HLR_Tests.ttcn
index da6ad7c..b6bd1ad 100644
--- a/hlr/HLR_Tests.ttcn
+++ b/hlr/HLR_Tests.ttcn
@@ -1,5 +1,19 @@
 module HLR_Tests {
 
+/* HLR test suite in TTCN-3
+ * (C) 2017-2018 Harald Welte <laforge@gnumonks.org>
+ * (C) 2018 sysmocom - s.f.m.c. GmbH
+ * (C) 2018 Vadim Yanitskiy <axilirator@gmail.com>
+ * All rights reserved.
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+
+
 import from GSUP_Types all;
 import from GSUP_Emulation all;
 import from IPA_Emulation all;