diff --git a/tests/gsup/gsup_test.c b/tests/gsup/gsup_test.c
index 7af16b7..42e7b81 100644
--- a/tests/gsup/gsup_test.c
+++ b/tests/gsup/gsup_test.c
@@ -114,6 +114,60 @@
 		0x07, 0x00,
 	};
 
+	static const uint8_t send_auth_info_res_umts[] = {
+		0x0a,
+		TEST_IMSI_IE,
+		0x03, 0x62, /* Auth tuple */
+			0x20, 0x10, /* rand */
+				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+				0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+			0x21, 0x04, /* sres */
+				0x21, 0x22, 0x23, 0x24,
+			0x22, 0x08, /* kc */
+				0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
+			0x23, 0x10, /* IK (UMTS) */
+				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+				0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+			0x24, 0x10, /* CK (UMTS) */
+				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+				0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+			0x25, 0x10, /* AUTN (UMTS) */
+				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+				0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+			0x25, 0x08, /* RES (UMTS) */
+				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+		0x03, 0x22, /* Auth tuple */
+			0x20, 0x10, /* rand */
+				0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
+				0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0x10,
+			0x21, 0x04, /* sres */
+				0xb1, 0xb2, 0xb3, 0xb4,
+			0x22, 0x08, /* kc */
+				0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8,
+			0x23, 0x10, /* IK (UMTS) */
+				0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8,
+				0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xd0,
+			0x24, 0x10, /* CK (UMTS) */
+				0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8,
+				0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xe0,
+			0x25, 0x10, /* AUTN (UMTS) */
+				0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
+				0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, 0xf0,
+			0x25, 0x08, /* RES (UMTS) */
+				0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
+	};
+
+	static const uint8_t send_auth_info_req_auts[] = {
+		0x08,
+		TEST_IMSI_IE,
+		0x26, 0x0e,
+			0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+			0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
+		0x20, 0x10,
+			0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+			0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+	};
+
 	static const struct test {
 		char *name;
 		const uint8_t *data;
@@ -143,6 +197,10 @@
 			purge_ms_err, sizeof(purge_ms_err)},
 		{"Purge MS Result",
 			purge_ms_res, sizeof(purge_ms_res)},
+		{"Send Authentication Info Result with IK, CK, AUTN and RES (UMTS)",
+			send_auth_info_req_auts, sizeof(send_auth_info_req_auts)},
+		{"Send Authentication Info Request with AUTS and RAND (UMTS)",
+			send_auth_info_req_auts, sizeof(send_auth_info_req_auts)},
 	};
 
 	printf("Test GSUP message decoding/encoding\n");
@@ -192,7 +250,7 @@
 					osmo_hexdump(t->data + j, ie_end - j));
 
 				OSMO_ASSERT(j <= ie_end - 2);
-				OSMO_ASSERT(t->data[j+0] <= OSMO_GSUP_KC_IE);
+				OSMO_ASSERT(t->data[j+0] <= OSMO_GSUP_CN_DOMAIN_IE);
 				OSMO_ASSERT(t->data[j+1] <= ie_end - j - 2);
 
 				ie_end = j;
diff --git a/tests/gsup/gsup_test.ok b/tests/gsup/gsup_test.ok
index 1285897..a0b3f35 100644
--- a/tests/gsup/gsup_test.ok
+++ b/tests/gsup/gsup_test.ok
@@ -11,4 +11,6 @@
   Testing Purge MS Request
   Testing Purge MS Error
   Testing Purge MS Result
+  Testing Send Authentication Info Result with IK, CK, AUTN and RES (UMTS)
+  Testing Send Authentication Info Request with AUTS and RAND (UMTS)
 Done.