diff --git a/bin/tests/system/xfer/ans10/ans.py b/bin/tests/system/xfer/ans10/ans.py
new file mode 100644
index 0000000000..6f5346ff86
--- /dev/null
+++ b/bin/tests/system/xfer/ans10/ans.py
@@ -0,0 +1,25 @@
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# SPDX-License-Identifier: MPL-2.0
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0.  If a copy of the MPL was not distributed with this
+# file, you can obtain one at https://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
+from isctest.asyncserver import (
+    AsyncDnsServer,
+    IgnoreAllQueries,
+)
+
+
+def main() -> None:
+    server = AsyncDnsServer()
+    server.install_response_handler(IgnoreAllQueries())
+    server.run()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/bin/tests/system/xfer/ns6/named.conf.j2 b/bin/tests/system/xfer/ns6/named.conf.j2
index 9b37f20910..08ca01f331 100644
--- a/bin/tests/system/xfer/ns6/named.conf.j2
+++ b/bin/tests/system/xfer/ns6/named.conf.j2
@@ -87,7 +87,7 @@ zone "axfr-rndc-retransfer-force" {
 
 zone "xot-primary-try-next" {
 	type secondary;
-	primaries { 10.53.0.99 port @EXTRAPORT1@ tls ephemeral; 10.53.0.1; };
+	primaries { 10.53.0.10 port @EXTRAPORT1@ tls ephemeral; 10.53.0.1; };
 	file "xot-primary-try-next.bk";
 };