diff --git a/hnbgw/HNBGW_Tests.ttcn b/hnbgw/HNBGW_Tests.ttcn
index d77a18f..d76ff9d 100644
--- a/hnbgw/HNBGW_Tests.ttcn
+++ b/hnbgw/HNBGW_Tests.ttcn
@@ -18,6 +18,7 @@
 import from GSM_Types all;
 import from Osmocom_Types all;
 import from IPL4asp_Types all;
+import from Native_Functions all;
 
 import from Osmocom_CTRL_Functions all;
 import from Osmocom_CTRL_Types all;
@@ -1314,7 +1315,7 @@
 
 	/* Acting as UPF, invent a new PFCP SEID to send to HNBGW. Respond to the Session Establishment.
 	 * The PFCP response must have the same sequence_number as the request. */
-	var F_SEID up_f_seid := valueof(ts_PFCP_F_SEID_ipv4("127.0.0.1", '1111111111111111'O));
+	var F_SEID up_f_seid := valueof(ts_PFCP_F_SEID_ipv4(f_inet_addr("127.0.0.1"), '1111111111111111'O));
 	var template PDU_PFCP r := ts_PFCP_Session_Est_Resp(m.sequence_number, upf_node_id, hnbgw_f_seid.seid);
 	r.message_body.pfcp_session_establishment_response := {
 		offending_ie := omit,
@@ -1322,10 +1323,10 @@
 		created_PDR_list := {
 			ts_PFCP_Created_PDR(pdr_id := serq.create_PDR_list[0].grouped_ie.pdr_id,
 					    local_F_TEID := ts_PFCP_F_TEID_ipv4(gtp_pars.core.local.teid,
-										gtp_pars.core.local.addr)),
+										f_inet_addr(gtp_pars.core.local.addr))),
 			ts_PFCP_Created_PDR(pdr_id := serq.create_PDR_list[1].grouped_ie.pdr_id,
 					    local_F_TEID := ts_PFCP_F_TEID_ipv4(gtp_pars.access.local.teid,
-										gtp_pars.access.local.addr))
+										f_inet_addr(gtp_pars.access.local.addr)))
 		},
 		load_control_information := omit,
 		overload_control_information := omit,