diff --git a/ggsn_tests/GGSN_Tests.ttcn b/ggsn_tests/GGSN_Tests.ttcn
index d7de443..c949dc9 100644
--- a/ggsn_tests/GGSN_Tests.ttcn
+++ b/ggsn_tests/GGSN_Tests.ttcn
@@ -1489,8 +1489,9 @@
 		f_init();
 		var OCT4 ggsn_ip4_dns1 := f_inet_addr(m_ggsn_ip4_dns1);
 		var OCT4 ggsn_ip4_dns2 := f_inet_addr(m_ggsn_ip4_dns2);
+		var uint8_t ipcp_req_id := oct2int(f_rnd_octstring(1));
 		var PdpContext ctx := valueof(t_DefinePDP(f_rnd_imsi('26242'H), "1234", c_ApnInternet, valueof(t_EuaIPv4Dyn)));
-		ctx.pco_req := valueof(ts_PCO_IPv4_DNS_IPCP);
+		ctx.pco_req := valueof(ts_PCO_IPv4_DNS_IPCP(ipcp_req_id));
 		f_pdp_ctx_act(ctx);
 		f_PCO_ensure_no_duplicates(ctx.pco_neg);
 		/* verify IPCP is at all contained */
@@ -1499,9 +1500,13 @@
 		}
 		/* verify IPCP contains both primary and secondary DNS */
 		var IpcpPacket ipcp := dec_IpcpPacket(f_PCO_extract_proto(ctx.pco_neg, '8021'O));
-		if (not match(ipcp, tr_IPCP_Ack_DNS(0, ggsn_ip4_dns1, ggsn_ip4_dns2))) {
-			if (not match(ipcp, tr_IPCP_Ack_DNS(0))) {
-				setverdict(fail, "Primary/Secondary DNS PCO IPCP option not found");
+		if (not match(ipcp, tr_IPCP_Ack_DNS(ipcp_req_id, ggsn_ip4_dns1, ggsn_ip4_dns2))) {
+			if (not match(ipcp, tr_IPCP_Ack_DNS(ipcp_req_id))) {
+				if (not match(ipcp, tr_IPCP_Ack_DNS(?))) {
+					setverdict(fail, "Primary/Secondary DNS PCO IPCP option not found");
+				} else {
+					setverdict(fail, "Primary/Secondary DNS PCO IPCP option found but not matching expected identifier");
+				}
 			} else {
 				setverdict(fail, "Primary/Secondary DNS PCO IPCP option found but not matching expected values");
 			}