diff --git a/testdata/tcp_idle_timeout.tdir/tcp_idle_timeout.conf b/testdata/tcp_idle_timeout.tdir/tcp_idle_timeout.conf
index e778ca55b..df769aa1d 100644
--- a/testdata/tcp_idle_timeout.tdir/tcp_idle_timeout.conf
+++ b/testdata/tcp_idle_timeout.tdir/tcp_idle_timeout.conf
@@ -9,7 +9,7 @@ server:
 	chroot: ""
 	username: ""
 	do-not-query-localhost: no
-	tcp-idle-timeout: 2
+	tcp-idle-timeout: 2000
 
 forward-zone:
 	name: "."