diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 05a334994..0103bbc8f 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -2190,6 +2190,8 @@ private altstep as_l1_sacch_loop() runs on ConnHdlr {
 		L1CTL.send(ts_L1CTL_DATA_REQ_SACCH(g_chan_nr, ts_RslLinkID_SACCH(0), l1h, l2));
 		repeat;
 		}
+	/* dequeue (ignore) L1CTL DATA.cnf for UL SACCH (SAPI=0) */
+	[] L1CTL.receive(tr_L1CTL_DATA_CONF(g_chan_nr, tr_RslLinkID_SACCH(0))) { repeat; }
 }
 
 /* handle incoming downlink SACCH, decode the L1 header into the given record */
@@ -2220,6 +2222,8 @@ private altstep as_l1_dcch_loop() runs on ConnHdlr {
 			f_pad_oct(pl, 23, '2B'O)));
 		repeat;
 		}
+	/* dequeue (ignore) L1CTL DATA.cnf for UL DCCH (SAPI=0) */
+	[] L1CTL.receive(tr_L1CTL_DATA_CONF(g_chan_nr, tr_RslLinkID_DCCH(0))) { repeat; }
 }
 
 private altstep as_l1_tch_loop() runs on ConnHdlr {
@@ -2240,6 +2244,8 @@ private altstep as_l1_tch_loop() runs on ConnHdlr {
 
 		repeat;
 		}
+	/* dequeue (ignore) L1CTL TRAFFIC.cnf for UL TCH */
+	[] L1CTL.receive(tr_L1CTL_TRAFFIC_CONF(g_chan_nr, tr_RslLinkID_DCCH(0))) { repeat; }
 }
 
 private type record MeasElem {