diff --git a/bin/tests/system/serve-stale/ns3/named6.conf.in b/bin/tests/system/serve-stale/ns3/named6.conf.in
index add8d1a594..307c3bcedc 100644
--- a/bin/tests/system/serve-stale/ns3/named6.conf.in
+++ b/bin/tests/system/serve-stale/ns3/named6.conf.in
@@ -11,10 +11,6 @@
  * information regarding copyright ownership.
  */
 
-/*
- * Test stale-answer-client-timeout 0.
- */
-
 key rndc_key {
 	secret "1234abcd8765";
 	algorithm @DEFAULT_HMAC@;