1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/extra_unused_lifetimes.rs b/tests/ui/extra_unused_lifetimes.rs
index 69dc2f7965e..f76127a7105 100644
--- a/tests/ui/extra_unused_lifetimes.rs
+++ b/tests/ui/extra_unused_lifetimes.rs
@@ -88,4 +88,30 @@ mod issue6437 {
     }
 }
 
+// https://github.com/rust-lang/rust-clippy/pull/8737#pullrequestreview-951268213
+mod first_case {
+    use serde::de::Visitor;
+    pub trait Expected {
+        fn fmt(&self, formatter: &mut std::fmt::Formatter);
+    }
+
+    impl<'de, T> Expected for T
+    where
+        T: Visitor<'de>,
+    {
+        fn fmt(&self, formatter: &mut std::fmt::Formatter) {}
+    }
+}
+
+// https://github.com/rust-lang/rust-clippy/pull/8737#pullrequestreview-951268213
+mod second_case {
+    pub trait Source {
+        fn hey();
+    }
+
+    impl<'a, T: Source + ?Sized + 'a> Source for Box<T> {
+        fn hey() {}
+    }
+}
+
 fn main() {}