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diff --git a/tests/ui/async-await/in-trait/implied-bounds.rs b/tests/ui/async-await/in-trait/implied-bounds.rs
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index 000000000..52bceb3cc
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+++ b/tests/ui/async-await/in-trait/implied-bounds.rs
@@ -0,0 +1,13 @@
+// check-pass
+// edition: 2021
+
+#![feature(async_fn_in_trait)]
+#![allow(incomplete_features)]
+
+trait TcpStack {
+    type Connection<'a>: Sized where Self: 'a;
+    fn connect<'a>(&'a self) -> Self::Connection<'a>;
+    async fn async_connect<'a>(&'a self) -> Self::Connection<'a>;
+}
+
+fn main() {}