diff --git a/unit/test-avdtp.c b/unit/test-avdtp.c
index 73a5d45..f8ecf1d 100644
--- a/unit/test-avdtp.c
+++ b/unit/test-avdtp.c
@@ -270,6 +270,11 @@ static gboolean sep_open_ind(struct avdtp *session, struct avdtp_local_sep *sep,
 {
 	struct context *context = user_data;
 
+	if (g_str_equal(context->data->test_name, "/TP/SIG/SMG/BI-18-C")) {
+		*err = 0xc0;
+		return FALSE;
+	}
+
 	context->pending_open = TRUE;
 	context->stream = stream;
 
@@ -821,6 +826,17 @@ int main(int argc, char *argv[])
 				0xff, 0xff, 0x02, 0x40),
 			raw_pdu(0x30, 0x06, 0x04),
 			raw_pdu(0x33, 0x06, 0x31));
+	define_test("/TP/SIG/SMG/BI-18-C", test_server,
+			raw_pdu(0x00, 0x01),
+			raw_pdu(0x02, 0x01, 0x04, 0x00),
+			raw_pdu(0x10, 0x02, 0x04),
+			raw_pdu(0x12, 0x02, 0x01, 0x00, 0x07, 0x06, 0x00, 0x00,
+				0xff, 0xff, 0x02, 0x40),
+			raw_pdu(0x20, 0x03, 0x04, 0x04, 0x01, 0x00, 0x07, 0x06,
+				0x00, 0x00, 0x21, 0x02, 0x02, 0x20),
+			raw_pdu(0x22, 0x03),
+			raw_pdu(0x30, 0x06, 0x04),
+			raw_pdu(0x33, 0x06, 0xc0));
 
 	return g_test_run();
 }