diff --git a/bin/tests/system/upforwd/tests.sh b/bin/tests/system/upforwd/tests.sh
index aec19ce92f..439f3c996c 100644
--- a/bin/tests/system/upforwd/tests.sh
+++ b/bin/tests/system/upforwd/tests.sh
@@ -187,7 +187,7 @@ then
 	update add unsigned.example2. 600 TXT Foo
 	send
 EOF
-	$DIG unsigned.example2 A @10.53.0.1 > dig.out.ns1.test$n
+	$DIG -p ${PORT} unsigned.example2 A @10.53.0.1 > dig.out.ns1.test$n
 	grep "status: NOERROR" dig.out.ns1.test$n > /dev/null || ret=1
 	if [ $ret != 0 ] ; then echo_i "failed"; fi
 	status=`expr $status + $ret`