3 files changed, 3 insertions, 0 deletions
diff --git a/library/alloc/src/collections/binary_heap/mod.rs b/library/alloc/src/collections/binary_heap/mod.rs
index fe9f1010d32..a19a044fc7e 100644
--- a/library/alloc/src/collections/binary_heap/mod.rs
+++ b/library/alloc/src/collections/binary_heap/mod.rs
@@ -959,6 +959,7 @@ impl<T, A: Allocator> BinaryHeap<T, A> {
     /// }
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[cfg_attr(not(test), rustc_diagnostic_item = "binaryheap_iter")]
     pub fn iter(&self) -> Iter<'_, T> {
         Iter { iter: self.data.iter() }
     }
diff --git a/library/alloc/src/collections/btree/set.rs b/library/alloc/src/collections/btree/set.rs
index 2b5bebcd8cd..770cd80ea9c 100644
--- a/library/alloc/src/collections/btree/set.rs
+++ b/library/alloc/src/collections/btree/set.rs
@@ -1132,6 +1132,7 @@ impl<T, A: Allocator + Clone> BTreeSet<T, A> {
     /// assert_eq!(set_iter.next(), None);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[cfg_attr(not(test), rustc_diagnostic_item = "btreeset_iter")]
     pub fn iter(&self) -> Iter<'_, T> {
         Iter { iter: self.map.keys() }
     }
diff --git a/library/alloc/src/collections/vec_deque/mod.rs b/library/alloc/src/collections/vec_deque/mod.rs
index 8c9db063105..a438517b75b 100644
--- a/library/alloc/src/collections/vec_deque/mod.rs
+++ b/library/alloc/src/collections/vec_deque/mod.rs
@@ -1201,6 +1201,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
     /// assert_eq!(&c[..], b);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[cfg_attr(not(test), rustc_diagnostic_item = "vecdeque_iter")]
     pub fn iter(&self) -> Iter<'_, T> {
         let (a, b) = self.as_slices();
         Iter::new(a.iter(), b.iter())