diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 4753ae937..501b3e938 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -1976,6 +1976,10 @@ testcase TC_chan_rel_conn_fail() runs on test_CT {
 
 	dt := f_est_dchan('23'O, 23, '00010203040506'O);
 
+	/* Sending CONN FAIL IND immediately may trigger a race condition.
+	 * Give the BSC some time to process a new SCCP connection (OS#5823). */
+	f_sleep(0.2);
+
 	/* simulate CONN FAIL IND */
 	f_ipa_tx(ts_RSL_CONN_FAIL_IND(dt.rsl_chan_nr, RSL_ERR_RADIO_LINK_FAIL));
 	/* TODO: different cause values? */