diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index cdc64b8..936544b 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -2460,7 +2460,9 @@
 	execute( TC_assignment_sign() );
 	execute( TC_assignment_fr_a5_0() );
 	execute( TC_assignment_fr_a5_1() );
-	execute( TC_assignment_fr_a5_1_codec_missing() );
+	if (mp_bssap_cfg.transport == BSSAP_TRANSPORT_AoIP) {
+		execute( TC_assignment_fr_a5_1_codec_missing() );
+	}
 	execute( TC_assignment_fr_a5_3() );
 	execute( TC_assignment_fr_a5_4() );
 	execute( TC_ciph_mode_a5_0() );