diff --git a/tests/ui/type/subtyping-opaque-type.rs b/tests/ui/type/subtyping-opaque-type.rs
deleted file mode 100644
index e17114a36476..000000000000
--- a/tests/ui/type/subtyping-opaque-type.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-//@ check-pass
-//@ compile-flags: -Zvalidate-mir
-trait Duh {}
-
-impl Duh for i32 {}
-
-trait Trait {
-    type Assoc: Duh;
-}
-
-impl<R: Duh, F: FnMut() -> R> Trait for F {
-    type Assoc = R;
-}
-
-fn foo() -> impl Trait<Assoc = impl Send> {
-    || 42
-}
-
-fn main() {}