diff --git a/src/test/ui/consts/const_discriminant.rs b/src/test/ui/consts/const_discriminant.rs
index c67be3c3713..55e2918c85f 100644
--- a/src/test/ui/consts/const_discriminant.rs
+++ b/src/test/ui/consts/const_discriminant.rs
@@ -4,6 +4,7 @@
 
 use std::mem::{discriminant, Discriminant};
 
+#[inline(never)]
 fn identity<T>(x: T) -> T { x }
 
 enum Test {