diff --git a/bin/tests/system/addzone/ns3/named1.conf.in b/bin/tests/system/addzone/ns3/named1.conf.in
index 0202b8e328..117ca76204 100644
--- a/bin/tests/system/addzone/ns3/named1.conf.in
+++ b/bin/tests/system/addzone/ns3/named1.conf.in
@@ -34,5 +34,5 @@ zone "." {
 };
 
 primaries "test" {
-	192.5.5.241;
+	10.53.0.99;
 };