diff --git a/src/test/ui/async-await/suggest-missing-await.stderr b/src/test/ui/async-await/suggest-missing-await.stderr
index 5757f39af18cd..3cca9616a358a 100644
--- a/src/test/ui/async-await/suggest-missing-await.stderr
+++ b/src/test/ui/async-await/suggest-missing-await.stderr
@@ -117,7 +117,7 @@ note: while checking the return type of the `async fn`
    |
 LL | async fn dummy_result() -> Result<(), ()> {
    |                            ^^^^^^^^^^^^^^ checked the `Output` of this `async fn`, expected opaque type
-   = note: expected opaque type `impl Future`
+   = note: expected opaque type `impl Future<Output = Result<(), ()>>`
                      found enum `Result<_, _>`
 help: consider `await`ing on the `Future`
    |
@@ -135,7 +135,7 @@ note: while checking the return type of the `async fn`
    |
 LL | async fn dummy_result() -> Result<(), ()> {
    |                            ^^^^^^^^^^^^^^ checked the `Output` of this `async fn`, expected opaque type
-   = note: expected opaque type `impl Future`
+   = note: expected opaque type `impl Future<Output = Result<(), ()>>`
                      found enum `Result<_, _>`
 help: consider `await`ing on the `Future`
    |