diff --git a/mgw/MGCP_Test.ttcn b/mgw/MGCP_Test.ttcn
index 8746c38d6..d816a7188 100644
--- a/mgw/MGCP_Test.ttcn
+++ b/mgw/MGCP_Test.ttcn
@@ -1164,8 +1164,8 @@ module MGCP_Test {
 		f_sleep(0.5);
 
 		/* Start inserting unsolicited RTP packets */
-		f_rtpem_bind(RTPEM[2], "127.0.0.1", unsolicited_port);
-		f_rtpem_connect(RTPEM[2], "127.0.0.1", flow[0].mgw.portnr);
+		f_rtpem_bind(RTPEM[2], mp_local_ip, unsolicited_port);
+		f_rtpem_connect(RTPEM[2], mp_remote_ip, flow[0].mgw.portnr);
 		f_rtpem_mode(RTPEM[2], RTPEM_MODE_TXONLY);
 
 		f_sleep(0.5);
@@ -1219,8 +1219,8 @@ module MGCP_Test {
 		 * transmitting for a while. We simulate this by injecting
 		 * some unsolicited packets on the behalf of the old source,
 		 * (old remote port) */
-		f_rtpem_bind(RTPEM[2], "127.0.0.1", port_old);
-		f_rtpem_connect(RTPEM[2], "127.0.0.1", flow[0].mgw.portnr);
+		f_rtpem_bind(RTPEM[2], mp_local_ip, port_old);
+		f_rtpem_connect(RTPEM[2], mp_remote_ip, flow[0].mgw.portnr);
 		f_rtpem_mode(RTPEM[2], RTPEM_MODE_TXONLY);
 		f_sleep(1.0);
 		f_rtpem_mode(RTPEM[2], RTPEM_MODE_NONE);