diff --git a/bsc/BSC_Tests_CBSP.ttcn b/bsc/BSC_Tests_CBSP.ttcn
index cba8268..1373002 100644
--- a/bsc/BSC_Tests_CBSP.ttcn
+++ b/bsc/BSC_Tests_CBSP.ttcn
@@ -992,7 +992,7 @@
 
 private function f_exp_rsl_etws(integer rsl_idx := 0, boolean enabled) runs on cbsp_test_CT {
 	var template (present) octetstring tr_apdu;
-	timer T := 5.0;
+	timer T := 5.0 + 0.5; /* +0.5s guard */
 
 	if (enabled) {
 		tr_apdu := f_gen_etws_pn(g_cbsp_ser_no, g_cbsp_msg_id);