diff --git a/bin/tests/system/nsupdate/ns2/named.conf b/bin/tests/system/nsupdate/ns2/named.conf
index 490126094f..7ee1427d11 100644
--- a/bin/tests/system/nsupdate/ns2/named.conf
+++ b/bin/tests/system/nsupdate/ns2/named.conf
@@ -20,6 +20,7 @@ options {
 	listen-on-v6 { none; };
 	recursion yes;
 	notify yes;
+	serial-query-rate 1; // workaround for KB AA-01213
 };
 
 key altkey {