diff --git a/openbsc/tests/gbproxy/gbproxy_test.c b/openbsc/tests/gbproxy/gbproxy_test.c
index 33b0ac5..75dc173 100644
--- a/openbsc/tests/gbproxy/gbproxy_test.c
+++ b/openbsc/tests/gbproxy/gbproxy_test.c
@@ -66,9 +66,22 @@
 	0xf4, 0xfb, 0xc5, 0x47, 0x22, 0x42, 0x67, 0x9a
 };
 
+/* Base Station Subsystem GPRS Protocol: GSM A-I/F DTAP - GMM Information */
+static const unsigned char bssgp_gmm_information[66] = {
+	0x00, 0xef, 0xe2, 0xb7, 0x00, 0x00, 0x50, 0x20,
+	0x16, 0x82, 0x02, 0x58, 0x13, 0x99, 0x18, 0xb3,
+	0x43, 0x2b, 0x25, 0x96, 0x62, 0x00, 0x60, 0x80,
+	0x9a, 0xc2, 0xc6, 0x62, 0x00, 0x60, 0x80, 0xba,
+	0xc8, 0xc6, 0x62, 0x00, 0x60, 0x80, 0x00, 0x0a,
+	0x82, 0x08, 0x02, 0x0d, 0x88, 0x11, 0x12, 0x13,
+	0x14, 0x15, 0x16, 0x17, 0x18, 0x00, 0x81, 0x00,
+	0x0e, 0x88, 0x41, 0xc0, 0x09, 0x08, 0x21, 0x04,
+	0xba, 0x3d
+};
+
 /* Base Station Subsystem GPRS Protocol: GSM A-I/F DTAP - Routing Area Update Request */
 static const unsigned char bssgp_ra_upd_req[85] = {
-	0x01, 0xaf, 0xe2, 0x80, 0x6e, 0x00, 0x00, 0x04,
+	0x01, 0xbb, 0xc5, 0x46, 0x79, 0x00, 0x00, 0x04,
 	0x08, 0x88, 0x11, 0x22, 0x33, 0x40, 0x50, 0x60,
 	0x70, 0x80, 0x00, 0x80, 0x0e, 0x00, 0x3e, 0x01,
 	0xc0, 0x15, 0x08, 0x08, 0x10, 0x11, 0x22, 0x33,
@@ -83,7 +96,7 @@
 
 /* Base Station Subsystem GPRS Protocol: GSM A-I/F DTAP - Routing Area Update Accept */
 static const unsigned char bssgp_ra_upd_acc[91] = {
-	0x00, 0xaf, 0xe2, 0x80, 0x6e, 0x00, 0x50, 0x20,
+	0x00, 0xbb, 0xc5, 0x46, 0x79, 0x00, 0x50, 0x20,
 	0x16, 0x82, 0x02, 0x58, 0x13, 0x9d, 0x19, 0x13,
 	0x42, 0x33, 0x57, 0x2b, 0xf7, 0xc8, 0x48, 0x02,
 	0x13, 0x48, 0x50, 0xc8, 0x48, 0x02, 0x14, 0x48,
@@ -853,6 +866,9 @@
 	send_ns_unitdata(nsi, "RA UPD ACC", &sgsn_peer, 0x1002,
 			 bssgp_ra_upd_acc, sizeof(bssgp_ra_upd_acc));
 
+	send_ns_unitdata(nsi, "GMM INFO", &sgsn_peer, 0x1002,
+			 bssgp_gmm_information, sizeof(bssgp_gmm_information));
+
 	/* Replace APN */
 	send_ns_unitdata(nsi, "ACT PDP CTX REQ (REPLACE APN)",
 			 &bss_peer[0], 0x1002,