diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index e7c4599..c2ea258 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -720,6 +720,9 @@
 	pars.exp_ms_power_level := mp_exp_ms_power_level;
 	pars.mscpool.bssap_idx := bssap_idx;
 	pars.expect_tsc := BTS_TSC[0];
+	pars.imsi := f_rnd_imsi('00101'H);
+
+	log(testcasename(), ": using IMSI ", pars.imsi);
 
 	return pars;
 }