diff --git a/crates/ide-assists/src/handlers/flip_trait_bound.rs b/crates/ide-assists/src/handlers/flip_trait_bound.rs
index 430cd5b080b..70b5efcb645 100644
--- a/crates/ide-assists/src/handlers/flip_trait_bound.rs
+++ b/crates/ide-assists/src/handlers/flip_trait_bound.rs
@@ -58,6 +58,11 @@ mod tests {
         check_assist_not_applicable(flip_trait_bound, "struct S<T> where T: $0A { }")
     }
 
+    #[test]
+    fn flip_trait_bound_works_for_dyn() {
+        check_assist(flip_trait_bound, "fn f<'a>(x: dyn Copy $0+ 'a)", "fn f<'a>(x: dyn 'a + Copy)")
+    }
+
     #[test]
     fn flip_trait_bound_works_for_struct() {
         check_assist(