diff --git a/tests/ui/auto_enum/invalid_break.stderr b/tests/ui/auto_enum/invalid_break.stderr
index 5eecf150..00b8fd50 100644
--- a/tests/ui/auto_enum/invalid_break.stderr
+++ b/tests/ui/auto_enum/invalid_break.stderr
@@ -6,11 +6,11 @@ error[E0267]: `break` inside of a closure
   |     |
   |     enclosing closure
 
-error[E0267]: `break` inside of an `async` block
+error[E0267]: `break` inside `async` block
  --> tests/ui/auto_enum/invalid_break.rs:8:13
   |
 8 |     async { break }
   |     --------^^^^^--
   |     |       |
-  |     |       cannot `break` inside of an `async` block
+  |     |       cannot `break` inside `async` block
   |     enclosing `async` block