diff --git a/bin/tests/system/addzone/tests.sh b/bin/tests/system/addzone/tests.sh
index 0e9e46739b..a499b50ce2 100755
--- a/bin/tests/system/addzone/tests.sh
+++ b/bin/tests/system/addzone/tests.sh
@@ -251,7 +251,8 @@ status=`expr $status + $ret`
 
 echo "I:attempting to delete a policy zone ($n)"
 ret=0
-$RNDC -c ../common/rndc.conf -s 10.53.0.2 -p 9953 delzone 'policy in internal' 2>&1 | grep 'cannot be deleted' > /dev/null || ret=1
+$RNDC -c ../common/rndc.conf -s 10.53.0.2 -p 9953 delzone 'policy in internal' 2> rndc.out.ns2.$n >&1
+grep 'cannot be deleted' rndc.out.ns2.$n > /dev/null || ret=1
 n=`expr $n + 1`
 if [ $ret != 0 ]; then echo "I:failed"; fi
 status=`expr $status + $ret`