2 files changed, 22 insertions, 1 deletions
diff --git a/library/core/tests/iter/adapters/array_chunks.rs b/library/core/tests/iter/adapters/array_chunks.rs
index 4e9d89e1e..ef4a7e53b 100644
--- a/library/core/tests/iter/adapters/array_chunks.rs
+++ b/library/core/tests/iter/adapters/array_chunks.rs
@@ -139,7 +139,8 @@ fn test_iterator_array_chunks_fold() {
     let result =
         (0..10).map(|_| CountDrop::new(&count)).array_chunks::<3>().fold(0, |acc, _item| acc + 1);
     assert_eq!(result, 3);
-    assert_eq!(count.get(), 10);
+    // fold impls may or may not process the remainder
+    assert!(count.get() <= 10 && count.get() >= 9);
 }
 
 #[test]
diff --git a/library/core/tests/iter/adapters/take.rs b/library/core/tests/iter/adapters/take.rs
index bfb659f0a..3e26b43a2 100644
--- a/library/core/tests/iter/adapters/take.rs
+++ b/library/core/tests/iter/adapters/take.rs
@@ -146,3 +146,23 @@ fn test_take_try_folds() {
     assert_eq!(iter.try_for_each(Err), Err(2));
     assert_eq!(iter.try_for_each(Err), Ok(()));
 }
+
+#[test]
+fn test_byref_take_consumed_items() {
+    let mut inner = 10..90;
+
+    let mut count = 0;
+    inner.by_ref().take(0).for_each(|_| count += 1);
+    assert_eq!(count, 0);
+    assert_eq!(inner, 10..90);
+
+    let mut count = 0;
+    inner.by_ref().take(10).for_each(|_| count += 1);
+    assert_eq!(count, 10);
+    assert_eq!(inner, 20..90);
+
+    let mut count = 0;
+    inner.by_ref().take(100).for_each(|_| count += 1);
+    assert_eq!(count, 70);
+    assert_eq!(inner, 90..90);
+}