diff --git a/tests/ui/mir/mir_raw_fat_ptr.rs b/tests/ui/mir/mir_raw_fat_ptr.rs
index 6aceefbe7159d..c7227c2ee3823 100644
--- a/tests/ui/mir/mir_raw_fat_ptr.rs
+++ b/tests/ui/mir/mir_raw_fat_ptr.rs
@@ -1,7 +1,9 @@
 // run-pass
 // check raw fat pointer ops in mir
 // FIXME: please improve this when we get monomorphization support
+
 #![feature(raw_ref_op)]
+#![allow(invalid_pointer_trait_comparisons)]
 
 use std::mem;