diff --git a/bin/tests/system/org.isc.bind.system b/bin/tests/system/org.isc.bind.system
index 31c5615764..276437ad6e 100644
--- a/bin/tests/system/org.isc.bind.system
+++ b/bin/tests/system/org.isc.bind.system
@@ -11,8 +11,17 @@
 # See the COPYRIGHT file distributed with this work for additional
 # information regarding copyright ownership.
 
-for ns in 1 2 3 4 5 6 7 8
+ifup() {
+	/sbin/ifconfig lo0 10.53.$1.$3 alias
+	/sbin/ifconfig lo0 inet6 fd92:7065:b8e:${2}ff::${3} alias
+}
+
+for ns in 1 2 3 4 5 6 7 8 9 10
 do
-	/sbin/ifconfig lo0 10.53.0.$ns alias
-	/sbin/ifconfig lo0 inet6 fd92:7065:b8e:ffff::$ns alias
+	ifup 0 ff $ns
+done
+for ns in 1 2
+do
+	ifup 1 99 $ns
+	ifup 2 00 $ns
 done