diff --git a/pgw/PGW_Tests.ttcn b/pgw/PGW_Tests.ttcn
index 9846dab..2b74418 100644
--- a/pgw/PGW_Tests.ttcn
+++ b/pgw/PGW_Tests.ttcn
@@ -146,6 +146,12 @@
 	vc_DIAMETER.start(DIAMETER_Emulation.main(ops, pars, id));
 
 	f_diameter_wait_capability(DIAMETER_UNIT);
+	/* Give some time for our emulation to get out of SUSPECT list of SUT (3 watchdong ping-pongs):
+	 * RFC6733 sec 5.1
+	 * RFC3539 sec 3.4.1 [5]
+	 * https://github.com/freeDiameter/freeDiameter/blob/master/libfdcore/p_psm.c#L49
+	 */
+	f_sleep(1.0);
 }
 
 private function f_init(float guard_timeout := 60.0) runs on PGW_Test_CT {