diff --git a/tests/system_tests_tcp_adaptor.py b/tests/system_tests_tcp_adaptor.py
index 050c75e20..b4ed5371d 100644
--- a/tests/system_tests_tcp_adaptor.py
+++ b/tests/system_tests_tcp_adaptor.py
@@ -452,7 +452,7 @@ def router(name, mode, connection, extra=None, ssl=False, encapsulation="legacy"
                                           'encapsulation': encapsulation,
                                           'siteId': cls.site}
             if mode == "interior":
-                router_dict = {'mode': mode, 'id': name, 'dataConnectionCount': '4'}
+                router_dict = {'mode': mode, 'id': name, 'dataConnectionCount': '4', "helloMaxAgeSeconds": '10'}
             else:
                 router_dict = {'mode': mode, 'id': name}
             config = [