diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 2bc1c62..e25bf7f 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -1670,7 +1670,7 @@
 	bts[0].rsl.vc_IPA := IPA_Emulation_CT.create(bts[0].rsl.id & "-IPA");
 	bts[0].rsl.ccm_pars := c_IPA_default_ccm_pars;
 	bts[0].rsl.ccm_pars.name := "Osmocom TTCN-3 BTS Simulator";
-	bts[0].rsl.ccm_pars.unit_id := "0/0/0"; /* value which is unknown at BTS */
+	bts[0].rsl.ccm_pars.unit_id := "99/0/0"; /* value which is unknown at BTS */
 
 	f_ipa_ctrl_start(mp_bsc_ip, mp_bsc_ctrl_port);