diff --git a/benches/server.rs b/benches/server.rs
index cbc63a6a..c83a08d5 100644
--- a/benches/server.rs
+++ b/benches/server.rs
@@ -1,6 +1,6 @@
 #![feature(async_await)]
 #![feature(test)]
-//#![deny(warnings)]
+#![deny(warnings)]
 
 extern crate test;