diff --git a/bin/tests/system/resolver/ns5/named.conf.in b/bin/tests/system/resolver/ns5/named.conf.in
index a3e59023d7..862b9e1133 100644
--- a/bin/tests/system/resolver/ns5/named.conf.in
+++ b/bin/tests/system/resolver/ns5/named.conf.in
@@ -29,6 +29,10 @@ server 10.53.0.7 {
 	edns-version 0;
 };
 
+server 10.53.0.8 {
+	tcp-on-no-cookie false;
+};
+
 zone "." {
 	type hint;
 	file "root.hint";