diff --git a/components/background_hang_monitor/tests/hang_monitor_tests.rs b/components/background_hang_monitor/tests/hang_monitor_tests.rs
index a9818d1b09b..dbccb5e50de 100644
--- a/components/background_hang_monitor/tests/hang_monitor_tests.rs
+++ b/components/background_hang_monitor/tests/hang_monitor_tests.rs
@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
+#![allow(unused_imports)]
+
 #[macro_use]
 extern crate lazy_static;