diff --git a/tests/crashes/125249.rs b/tests/crashes/125249.rs
deleted file mode 100644
index 1cf6338a0d622..0000000000000
--- a/tests/crashes/125249.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-//@ known-bug: rust-lang/rust#125185
-#![feature(return_position_impl_trait_in_trait, return_type_notation)]
-
-trait IntFactory {
-    fn stream(&self) -> impl IntFactory<stream(..): IntFactory<stream(..): Send> + Send>;
-}
-
-pub fn main() {}
diff --git a/tests/crashes/126850.rs b/tests/ui/impl-trait/closure-in-type.rs
similarity index 81%
rename from tests/crashes/126850.rs
rename to tests/ui/impl-trait/closure-in-type.rs
index 0ddc24c8bb151..1e06e6e21fd2a 100644
--- a/tests/crashes/126850.rs
+++ b/tests/ui/impl-trait/closure-in-type.rs
@@ -1,4 +1,5 @@
-//@ known-bug: rust-lang/rust#126850
+//@ check-pass
+
 fn bug<T>() -> impl Iterator<
     Item = [(); {
                |found: &String| Some(false);
diff --git a/tests/ui/impl-trait/in-trait/return-type-notation.rs b/tests/ui/impl-trait/in-trait/return-type-notation.rs
new file mode 100644
index 0000000000000..3945eb9bdeef7
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/return-type-notation.rs
@@ -0,0 +1,9 @@
+#![allow(incomplete_features)]
+#![feature(return_type_notation)]
+
+trait IntFactory {
+    fn stream(&self) -> impl IntFactory<stream(..): IntFactory<stream(..): Send> + Send>;
+    //~^ ERROR cycle detected when resolving lifetimes for `IntFactory::stream`
+}
+
+pub fn main() {}
diff --git a/tests/ui/impl-trait/in-trait/return-type-notation.stderr b/tests/ui/impl-trait/in-trait/return-type-notation.stderr
new file mode 100644
index 0000000000000..d9fd780cdff3d
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/return-type-notation.stderr
@@ -0,0 +1,27 @@
+error[E0391]: cycle detected when resolving lifetimes for `IntFactory::stream`
+  --> $DIR/return-type-notation.rs:5:5
+   |
+LL |     fn stream(&self) -> impl IntFactory<stream(..): IntFactory<stream(..): Send> + Send>;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: ...which requires computing function signature of `IntFactory::stream`...
+  --> $DIR/return-type-notation.rs:5:5
+   |
+LL |     fn stream(&self) -> impl IntFactory<stream(..): IntFactory<stream(..): Send> + Send>;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+note: ...which requires looking up late bound vars inside `IntFactory::stream`...
+  --> $DIR/return-type-notation.rs:5:5
+   |
+LL |     fn stream(&self) -> impl IntFactory<stream(..): IntFactory<stream(..): Send> + Send>;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: ...which again requires resolving lifetimes for `IntFactory::stream`, completing the cycle
+note: cycle used when listing captured lifetimes for opaque `IntFactory::stream::{opaque#0}`
+  --> $DIR/return-type-notation.rs:5:25
+   |
+LL |     fn stream(&self) -> impl IntFactory<stream(..): IntFactory<stream(..): Send> + Send>;
+   |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0391`.