diff --git a/t/resolver.t b/t/resolver.t
index ea741412a..0823f08a2 100644
--- a/t/resolver.t
+++ b/t/resolver.t
@@ -13,7 +13,9 @@ run_tests();
 __DATA__
 
 === TEST 1: uses all resolvers
-both RESOLVER env variable and resolvers in resolv.conf should be used
+both RESOLVER env variable and resolvers in resolv.conf should be used.
+checking if commented 'nameserver' and 'search' keywords impact on the 
+resolv.conf file parsing.
 --- main_config
 env RESOLVER=$TEST_NGINX_RESOLVER;
 --- http_config