diff --git a/tests/ui/unnecessary_operation.fixed b/tests/ui/unnecessary_operation.fixed
index 006f123cbcdf..014166ac4a08 100644
--- a/tests/ui/unnecessary_operation.fixed
+++ b/tests/ui/unnecessary_operation.fixed
@@ -114,7 +114,7 @@ fn main() {
         break 'label
     };
     let () = const {
-        [42, 55][get_usize()];
+        assert!([42, 55].len() > get_usize());
     };
 }
 
diff --git a/tests/ui/unnecessary_operation.stderr b/tests/ui/unnecessary_operation.stderr
index 036a9a44bbad..5ee042ed8404 100644
--- a/tests/ui/unnecessary_operation.stderr
+++ b/tests/ui/unnecessary_operation.stderr
@@ -119,11 +119,17 @@ LL | |         s: String::from("blah"),
 LL | |     };
    | |______^ help: statement can be reduced to: `String::from("blah");`
 
+error: unnecessary operation
+  --> tests/ui/unnecessary_operation.rs:121:9
+   |
+LL |         [42, 55][get_usize()];
+   |         ^^^^^^^^^^^^^^^^^^^^^^ help: statement can be written as: `assert!([42, 55].len() > get_usize());`
+
 error: unnecessary operation
   --> tests/ui/unnecessary_operation.rs:130:5
    |
 LL |     [42, 55][get_usize()];
    |     ^^^^^^^^^^^^^^^^^^^^^^ help: statement can be written as: `assert!([42, 55].len() > get_usize());`
 
-error: aborting due to 20 previous errors
+error: aborting due to 21 previous errors