diff --git a/bin/tests/system/notify/ns3/named.conf b/bin/tests/system/notify/ns3/named.conf
index 5c4d21822b..454317a9a3 100644
--- a/bin/tests/system/notify/ns3/named.conf
+++ b/bin/tests/system/notify/ns3/named.conf
@@ -1,5 +1,5 @@
 options {
-	query-source address 10.53.0.1 port 5300;
+	query-source address 10.53.0.3 port 5300;
 	port 5300;
 	directory ".";
 	pid-file "named.pid";