diff --git a/tests/test.rs b/tests/test.rs
index 2d8b75b..002fd20 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -1025,3 +1025,26 @@
     #[async_trait]
     impl<T> Trait<T> for () {}
 }
+
+// https://github.com/dtolnay/async-trait/issues/129
+pub mod issue129 {
+    #![deny(clippy::pedantic)]
+
+    use async_trait::async_trait;
+
+    #[async_trait]
+    pub trait TestTrait {
+        async fn a(_b: u8, c: u8) -> u8 {
+            c
+        }
+    }
+
+    pub struct TestStruct;
+
+    #[async_trait]
+    impl TestTrait for TestStruct {
+        async fn a(_b: u8, c: u8) -> u8 {
+            c
+        }
+    }
+}
diff --git a/tests/ui/send-not-implemented.stderr b/tests/ui/send-not-implemented.stderr
index 2f288f5..05c445b 100644
--- a/tests/ui/send-not-implemented.stderr
+++ b/tests/ui/send-not-implemented.stderr
@@ -9,14 +9,14 @@
 12 | |     }
    | |_____^ future returned by `__test` is not `Send`
    |
-   = help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::sync::MutexGuard<'_, ()>`
+   = help: within `impl Future`, the trait `Send` is not implemented for `MutexGuard<'_, ()>`
 note: future is not `Send` as this value is used across an await
   --> $DIR/send-not-implemented.rs:11:9
    |
 10 |         let _guard = mutex.lock().unwrap();
-   |             ------ has type `std::sync::MutexGuard<'_, ()>` which is not `Send`
+   |             ------ has type `MutexGuard<'_, ()>` which is not `Send`
 11 |         f().await;
    |         ^^^^^^^^^ await occurs here, with `_guard` maybe used later
 12 |     }
    |     - `_guard` is later dropped here
-   = note: required for the cast to the object type `dyn std::future::Future<Output = ()> + std::marker::Send`
+   = note: required for the cast to the object type `dyn Future<Output = ()> + Send`