diff --git a/tests/ui/coroutine/gen_fn_iter.rs b/tests/ui/coroutine/gen_fn_iter.rs
new file mode 100644
index 00000000000..222ab571415
--- /dev/null
+++ b/tests/ui/coroutine/gen_fn_iter.rs
@@ -0,0 +1,18 @@
+// edition: 2024
+// compile-flags: -Zunstable-options
+// run-pass
+#![feature(gen_blocks)]
+
+gen fn foo() -> i32 {
+    yield 1;
+    yield 2;
+    yield 3;
+}
+
+fn main() {
+    let mut iter = foo();
+    assert_eq!(iter.next(), Some(1));
+    assert_eq!(iter.next(), Some(2));
+    assert_eq!(iter.next(), Some(3));
+    assert_eq!(iter.next(), None);
+}