diff --git a/tests/gsm48/rest_octets_test.ok b/tests/gsm48/rest_octets_test.ok
new file mode 100644
index 0000000..54204f2
--- /dev/null
+++ b/tests/gsm48/rest_octets_test.ok
@@ -0,0 +1,2 @@
+si13_encode (20): 90 00 d8 5a 6f c9 e5 84 10 ab 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 
+si13_decode (71)