diff --git a/selftest/real_suite/suites/sms/mo_mt_sms.py b/selftest/real_suite/suites/sms/mo_mt_sms.py
index b97d332..9c8cca9 100755
--- a/selftest/real_suite/suites/sms/mo_mt_sms.py
+++ b/selftest/real_suite/suites/sms/mo_mt_sms.py
@@ -10,7 +10,7 @@
 print('start nitb and bts...')
 nitb.bts_add(bts)
 nitb.start()
-sleep(.1)
+sleep(1)
 assert nitb.running()
 bts.start()
 
@@ -19,7 +19,7 @@
 
 ms_mo.connect(nitb)
 ms_mt.connect(nitb)
-wait(nitb.subscriber_attached, ms_mo, ms_mt)
+wait(nitb.subscriber_attached, ms_mo, ms_mt, timeout=20)
 
 sms = ms_mo.sms_send(ms_mt.msisdn)
 wait(ms_mt.sms_received, sms)