diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/check_etsi.c b/libs/sofia-sip/libsofia-sip-ua/nua/check_etsi.c
index bdfe040872..37fbd0f466 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nua/check_etsi.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/check_etsi.c
@@ -244,6 +244,8 @@ START_TEST(SIP_CC_OE_CE_TI_008)
   fail_unless(s2_check_callstate(nua_callstate_ready));
   fail_unless(s2_check_request(SIP_METHOD_ACK));
 
+  s2_fast_forward(5);
+
   respond_with_sdp(invite, d1, SIP_200_OK, TAG_END());
   fail_unless(s2_check_request(SIP_METHOD_ACK));
 
diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/check_session.c b/libs/sofia-sip/libsofia-sip-ua/nua/check_session.c
index a0e9af1b52..2a4423fb3a 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nua/check_session.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/check_session.c
@@ -2391,7 +2391,7 @@ START_TEST(bye_4_2_2)
   s2_fast_forward(300);
   invite_timer_round(nh, "300", NULL);
 
-  s2_fast_forward(300);
+  s2_fast_forward(140);
 
   nua_bye(nh, TAG_END());
 
@@ -2403,7 +2403,7 @@ START_TEST(bye_4_2_2)
   s2_free_message(bye);
   fail_unless(s2_check_event(nua_r_bye, 407));
 
-  s2_fast_forward(300);
+  s2_fast_forward(160);
 
   nua_authenticate(nh, NUTAG_AUTH(s2_auth_credentials), TAG_END());
   bye = s2_wait_for_request(SIP_METHOD_BYE);
diff --git a/libs/sofia-sip/libsofia-sip-ua/nua/test_s2.c b/libs/sofia-sip/libsofia-sip-ua/nua/test_s2.c
index c42e63e4e5..35ed88591a 100644
--- a/libs/sofia-sip/libsofia-sip-ua/nua/test_s2.c
+++ b/libs/sofia-sip/libsofia-sip-ua/nua/test_s2.c
@@ -125,6 +125,8 @@ void s2_fast_forward(unsigned long seconds)
     _su_time = _su_time_fast_forwarder;
 
   time_offset += seconds;
+
+  su_root_step(s2->root, 0);
 }
 
 /* -- NUA events -------------------------------------------------------- */