diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index a9cfa03..f2f7f5b 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -5656,10 +5656,9 @@
 	f_shutdown_helper();
 }
 
-
 /* 24.008 8.4 Unknown message must trigger RR STATUS */
 private function f_tc_err_84_unknown_msg(charstring id) runs on MSC_ConnHdlr {
-	f_est_single_l3(ts_RRM_UL_REL('00'O));
+	f_est_single_l3(ts_RRM_DTM_ASS_FAIL('00'O));
 	timer T := 3.0
 	alt {
 	[] RSL.receive(tr_RSL_DATA_REQ(g_chan_nr, ?, decmatch tr_RRM_RR_STATUS)) {