diff --git a/compiler/rustc_index/src/vec/tests.rs b/compiler/rustc_index/src/vec/tests.rs
index cb0f0db220d..7e5e41bd2d1 100644
--- a/compiler/rustc_index/src/vec/tests.rs
+++ b/compiler/rustc_index/src/vec/tests.rs
@@ -1,5 +1,3 @@
-#![allow(dead_code)]
-
 // Allows the macro invocation below to work
 use crate as rustc_index;