diff --git a/src/test/run-pass/ctfe/references.rs b/src/test/run-pass/ctfe/references.rs
index 946ed246bb0..d5ab8dd7a2a 100644
--- a/src/test/run-pass/ctfe/references.rs
+++ b/src/test/run-pass/ctfe/references.rs
@@ -28,9 +28,10 @@ fn main() {
         _ => panic!("c"),
     }
 
+    #[allow(unreachable_patterns)]
     match &43 {
         &42 => panic!(),
-        BOO => panic!(),
+        BOO => panic!(), // pattern is unreachable
         _ => println!("d"),
     }
 }