diff --git a/tests/ui/cast/cast-enum-to-int-issue-151116.rs b/tests/ui/cast/cast-enum-to-int-issue-151116.rs
index ac6ff7b806ed..2c278d61ec1c 100644
--- a/tests/ui/cast/cast-enum-to-int-issue-151116.rs
+++ b/tests/ui/cast/cast-enum-to-int-issue-151116.rs
@@ -8,4 +8,5 @@ enum Priority {
 fn main() {
     let priority = &Priority::Normal;
     let priority = priority as u8; //~ ERROR casting `&Priority` as `u8` is invalid
+    //~| HELP: dereference the expression
 }