diff --git a/libcxx/include/CMakeLists.txt b/libcxx/include/CMakeLists.txt
--- a/libcxx/include/CMakeLists.txt
+++ b/libcxx/include/CMakeLists.txt
@@ -141,6 +141,7 @@
   __algorithm/unique.h
   __algorithm/unique_copy.h
   __algorithm/unwrap_iter.h
+  __algorithm/unwrap_range.h
   __algorithm/upper_bound.h
   __assert
   __availability
diff --git a/libcxx/include/__algorithm/copy.h b/libcxx/include/__algorithm/copy.h
--- a/libcxx/include/__algorithm/copy.h
+++ b/libcxx/include/__algorithm/copy.h
@@ -10,6 +10,7 @@
 #define _LIBCPP___ALGORITHM_COPY_H
 
 #include <__algorithm/unwrap_iter.h>
+#include <__algorithm/unwrap_range.h>
 #include <__config>
 #include <__iterator/iterator_traits.h>
 #include <__iterator/reverse_iterator.h>
@@ -66,32 +67,29 @@
 __copy_impl(reverse_iterator<_InIter> __first,
             reverse_iterator<_InIter> __last,
             reverse_iterator<_OutIter> __result) {
-  auto __first_base = std::__unwrap_iter(__first.base());
-  auto __last_base = std::__unwrap_iter(__last.base());
-  auto __result_base = std::__unwrap_iter(__result.base());
+  auto __unwrapped_range = std::__unwrap_range(std::move(__first).base(), std::move(__last).base());
+  auto __first_base = __unwrapped_range.first.first;
+  auto __last_base = __unwrapped_range.second;
+  auto __result_un = std::__unwrap_iter(std::move(__result).base());
+
+  auto __result_base = __result_un.first;
+
   auto __result_first = __result_base - (__first_base - __last_base);
   std::__copy_impl(__last_base, __first_base, __result_first);
-  return std::make_pair(__last, reverse_iterator<_OutIter>(std::__rewrap_iter(__result.base(), __result_first)));
+  return std::make_pair(__last, reverse_iterator<_OutIter>(std::__rewrap_iter(__result_un.second, __result_first)));
 }
 
-template <class _InIter, class _Sent, class _OutIter,
-          __enable_if_t<!(is_copy_constructible<_InIter>::value
-                       && is_copy_constructible<_Sent>::value
-                       && is_copy_constructible<_OutIter>::value), int> = 0 >
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
-pair<_InIter, _OutIter> __copy(_InIter __first, _Sent __last, _OutIter __result) {
-  return std::__copy_impl(std::move(__first), std::move(__last), std::move(__result));
-}
-
-template <class _InIter, class _Sent, class _OutIter,
-          __enable_if_t<is_copy_constructible<_InIter>::value
-                     && is_copy_constructible<_Sent>::value
-                     && is_copy_constructible<_OutIter>::value, int> = 0>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
-pair<_InIter, _OutIter>
+template <class _InIter, class _Sent, class _OutIter>
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 pair<_InIter, _OutIter>
 __copy(_InIter __first, _Sent __last, _OutIter __result) {
-  auto __ret = std::__copy_impl(std::__unwrap_iter(__first), std::__unwrap_iter(__last), std::__unwrap_iter(__result));
-  return std::make_pair(std::__rewrap_iter(__first, __ret.first), std::__rewrap_iter(__result, __ret.second));
+  auto __unwrapped_range = std::__unwrap_range(std::move(__first), std::move(__last));
+  auto __first_un        = std::move(__unwrapped_range.first);
+  auto __result_un       = std::__unwrap_iter(std::move(__result));
+  auto __ret =
+      std::__copy_impl(std::move(__first_un.first), std::move(__unwrapped_range.second), std::move(__result_un.first));
+  return std::make_pair(
+      std::__rewrap_iter(__first_un.second, std::move(__ret.first)),
+      std::__rewrap_iter(__result_un.second, std::move(__ret.second)));
 }
 
 template <class _InputIterator, class _OutputIterator>
diff --git a/libcxx/include/__algorithm/copy_backward.h b/libcxx/include/__algorithm/copy_backward.h
--- a/libcxx/include/__algorithm/copy_backward.h
+++ b/libcxx/include/__algorithm/copy_backward.h
@@ -14,6 +14,7 @@
 #include <__config>
 #include <__iterator/iterator_traits.h>
 #include <__iterator/reverse_iterator.h>
+#include <__utility/move.h>
 #include <cstring>
 #include <type_traits>
 
@@ -35,10 +36,13 @@
 template <class _Iter1, class _Sent1, class _Iter2>
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
 pair<_Iter1, _Iter2> __copy_backward(_Iter1 __first, _Sent1 __last, _Iter2 __result) {
-  auto __ret = std::__copy_backward_impl(std::__unwrap_iter(__first),
-                                         std::__unwrap_iter(__last),
-                                         std::__unwrap_iter(__result));
-  return pair<_Iter1, _Iter2>(std::__rewrap_iter(__first, __ret.first), std::__rewrap_iter(__result, __ret.second));
+  auto __first_un = std::__unwrap_iter(std::move(__first));
+  auto __result_un = std::__unwrap_iter(std::move(__result));
+  auto __ret = std::__copy_backward_impl(__first_un.first,
+                                         std::__unwrap_iter(__last).first,
+                                         __result_un.first);
+  return pair<_Iter1, _Iter2>(
+      std::__rewrap_iter(__first_un.second, __ret.first), std::__rewrap_iter(__result_un.second, __ret.second));
 }
 
 template <class _BidirectionalIterator1, class _BidirectionalIterator2>
diff --git a/libcxx/include/__algorithm/move.h b/libcxx/include/__algorithm/move.h
--- a/libcxx/include/__algorithm/move.h
+++ b/libcxx/include/__algorithm/move.h
@@ -77,31 +77,25 @@
 __move_impl(reverse_iterator<_InIter> __first,
             reverse_iterator<_InIter> __last,
             reverse_iterator<_OutIter> __result) {
-  auto __first_base = std::__unwrap_iter(__first.base());
-  auto __last_base = std::__unwrap_iter(__last.base());
-  auto __result_base = std::__unwrap_iter(__result.base());
-  auto __result_first = __result_base - (__first_base - __last_base);
+  auto __first_base = std::__unwrap_iter(__first.base()).first;
+  auto __last_base = std::__unwrap_iter(__last.base()).first;
+  auto __result_un = std::__unwrap_iter(__result.base());
+  auto __result_first = __result_un.first - (__first_base - __last_base);
   std::__move_impl(__last_base, __first_base, __result_first);
-  return std::make_pair(__last, reverse_iterator<_OutIter>(std::__rewrap_iter(__result.base(), __result_first)));
+  return std::make_pair(__last, reverse_iterator<_OutIter>(std::__rewrap_iter(__result_un.second, __result_first)));
 }
 
 template <class _InIter, class _Sent, class _OutIter>
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
-__enable_if_t<is_copy_constructible<_InIter>::value
-           && is_copy_constructible<_Sent>::value
-           && is_copy_constructible<_OutIter>::value, pair<_InIter, _OutIter> >
+pair<_InIter, _OutIter>
 __move(_InIter __first, _Sent __last, _OutIter __result) {
-  auto __ret = std::__move_impl(std::__unwrap_iter(__first), std::__unwrap_iter(__last), std::__unwrap_iter(__result));
-  return std::make_pair(std::__rewrap_iter(__first, __ret.first), std::__rewrap_iter(__result, __ret.second));
-}
-
-template <class _InIter, class _Sent, class _OutIter>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
-__enable_if_t<!is_copy_constructible<_InIter>::value
-           || !is_copy_constructible<_Sent>::value
-           || !is_copy_constructible<_OutIter>::value, pair<_InIter, _OutIter> >
-__move(_InIter __first, _Sent __last, _OutIter __result) {
-  return std::__move_impl(std::move(__first), std::move(__last), std::move(__result));
+  auto __first_un = std::__unwrap_iter(std::move(__first));
+  auto __result_un = std::__unwrap_iter(std::move(__result));
+  auto __ret =
+      std::__move_impl(std::move(__first_un.first), std::__unwrap_iter(__last).first, std::move(__result_un.first));
+  return std::make_pair(
+      std::__rewrap_iter(__first_un.second, std::move(__ret.first)),
+      std::__rewrap_iter(__result_un.second, std::move(__ret.second)));
 }
 
 template <class _InputIterator, class _OutputIterator>
diff --git a/libcxx/include/__algorithm/move_backward.h b/libcxx/include/__algorithm/move_backward.h
--- a/libcxx/include/__algorithm/move_backward.h
+++ b/libcxx/include/__algorithm/move_backward.h
@@ -67,10 +67,11 @@
     if (__libcpp_is_constant_evaluated()) {
         return _VSTD::__move_backward_constexpr(__first, __last, __result);
     } else {
-        return _VSTD::__rewrap_iter(__result,
-            _VSTD::__move_backward(_VSTD::__unwrap_iter(__first),
-                                   _VSTD::__unwrap_iter(__last),
-                                   _VSTD::__unwrap_iter(__result)));
+        auto __result_un = _VSTD::__unwrap_iter(__result);
+        return std::__rewrap_iter(__result_un.second,
+            _VSTD::__move_backward(_VSTD::__unwrap_iter(__first).first,
+                                   _VSTD::__unwrap_iter(__last).first,
+                                   __result_un.first));
     }
 }
 
diff --git a/libcxx/include/__algorithm/sort.h b/libcxx/include/__algorithm/sort.h
--- a/libcxx/include/__algorithm/sort.h
+++ b/libcxx/include/__algorithm/sort.h
@@ -587,7 +587,7 @@
   if (__libcpp_is_constant_evaluated()) {
     std::__partial_sort<_Comp_ref>(__first, __last, __last, _Comp_ref(__comp));
   } else {
-    std::__sort<_Comp_ref>(std::__unwrap_iter(__first), std::__unwrap_iter(__last), _Comp_ref(__comp));
+    std::__sort<_Comp_ref>(std::__unwrap_iter(__first).first, std::__unwrap_iter(__last).first, _Comp_ref(__comp));
   }
 }
 
diff --git a/libcxx/include/__algorithm/unwrap_iter.h b/libcxx/include/__algorithm/unwrap_iter.h
--- a/libcxx/include/__algorithm/unwrap_iter.h
+++ b/libcxx/include/__algorithm/unwrap_iter.h
@@ -12,6 +12,8 @@
 #include <__config>
 #include <__iterator/iterator_traits.h>
 #include <__memory/pointer_traits.h>
+#include <__utility/move.h>
+#include <__utility/pair.h>
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -37,60 +39,54 @@
 
 template <class _Iter, bool = __is_cpp17_contiguous_iterator<_Iter>::value>
 struct __unwrap_iter_impl {
-    static _LIBCPP_CONSTEXPR _Iter
-    __apply(_Iter __i) _NOEXCEPT {
-        return __i;
-    }
+  static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Iter __rewrap(_Iter, _Iter __iter) { return __iter; }
+  static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Iter __unwrap(_Iter __i) _NOEXCEPT { return __i; }
 };
 
 #ifndef _LIBCPP_ENABLE_DEBUG_MODE
 
 template <class _Iter>
 struct __unwrap_iter_impl<_Iter, true> {
-    static _LIBCPP_CONSTEXPR decltype(_VSTD::__to_address(declval<_Iter>()))
-    __apply(_Iter __i) _NOEXCEPT {
-        return _VSTD::__to_address(__i);
-    }
+  using _ToAddressT = decltype(std::__to_address(declval<_Iter>()));
+
+  static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Iter __rewrap(_Iter __orig_iter, _ToAddressT __unwrapped_iter) {
+    return __orig_iter + (__unwrapped_iter - std::__to_address(__orig_iter));
+  }
+
+  static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ToAddressT __unwrap(_Iter __i) _NOEXCEPT {
+    return std::__to_address(__i);
+  }
 };
 
 #endif // !_LIBCPP_ENABLE_DEBUG_MODE
 
-template<class _Iter, class _Impl = __unwrap_iter_impl<_Iter> >
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-decltype(_Impl::__apply(declval<_Iter>()))
-__unwrap_iter(_Iter __i) _NOEXCEPT
-{
-    return _Impl::__apply(__i);
+template<class _Iter,
+         class _Impl = __unwrap_iter_impl<_Iter>,
+         __enable_if_t<is_copy_constructible<_Iter>::value, int> = 0>
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
+pair<decltype(_Impl::__unwrap(std::declval<_Iter>())), _Iter>
+__unwrap_iter(_Iter __i) _NOEXCEPT {
+  auto __unwrapped = _Impl::__unwrap(__i);
+  return std::make_pair(std::move(__unwrapped), std::move(__i));
 }
 
-template <class _OrigIter, class _UnwrappedIter>
-struct __rewrap_iter_impl {
-  static _LIBCPP_CONSTEXPR _OrigIter __apply(_OrigIter __first, _UnwrappedIter __result) {
-    // Precondition: __result is reachable from __first
-    // Precondition: _OrigIter is a contiguous iterator
-    return __first + (__result - std::__unwrap_iter(__first));
-  }
-};
+struct __move_only_iterator_tag {};
 
-template <class _OrigIter>
-struct __rewrap_iter_impl<_OrigIter, _OrigIter> {
-  static _LIBCPP_CONSTEXPR _OrigIter __apply(_OrigIter, _OrigIter __result) {
-    return __result;
-  }
-};
+template<class _Iter,
+         __enable_if_t<!is_copy_constructible<_Iter>::value, int> = 0>
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
+pair<_Iter, nullptr_t> __unwrap_iter(_Iter __i) _NOEXCEPT {
+  return std::make_pair(std::move(__i), __move_only_iterator_tag{});
+}
 
-template<class _OrigIter>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
-_OrigIter __rewrap_iter(_OrigIter, _OrigIter __result)
-{
-    return __result;
+template <class _OrigIter, class _Iter, class _Impl = __unwrap_iter_impl<_OrigIter> >
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _OrigIter __rewrap_iter(_OrigIter __orig_iter, _Iter __iter) _NOEXCEPT {
+  return _Impl::__rewrap(std::move(__orig_iter), std::move(__iter));
 }
 
-template<class _OrigIter, class _UnwrappedIter, class _Impl = __rewrap_iter_impl<_OrigIter, _UnwrappedIter> >
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR
-_OrigIter __rewrap_iter(_OrigIter __first, _UnwrappedIter __result)
-{
-  return _Impl::__apply(__first, __result);
+template <class _Iter>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Iter __rewrap_iter(__move_only_iterator_tag, _Iter __iter) _NOEXCEPT {
+  return __iter;
 }
 
 _LIBCPP_END_NAMESPACE_STD
diff --git a/libcxx/include/__algorithm/unwrap_range.h b/libcxx/include/__algorithm/unwrap_range.h
new file mode 100644
--- /dev/null
+++ b/libcxx/include/__algorithm/unwrap_range.h
@@ -0,0 +1,58 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___ALGORITHM_UNWRAP_RANGE_H
+#define _LIBCPP___ALGORITHM_UNWRAP_RANGE_H
+
+#include <__algorithm/unwrap_iter.h>
+#include <__concepts/constructible.h>
+#include <__config>
+#include <__iterator/concepts.h>
+#include <__iterator/next.h>
+#include <__utility/declval.h>
+#include <__utility/move.h>
+#include <__utility/pair.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER > 17
+template <class _Iter, class _Sent>
+struct __unwrap_range_impl {
+  _LIBCPP_HIDE_FROM_ABI static constexpr auto __unwrap(_Iter __first, _Sent __sent)
+    requires random_access_iterator<_Iter> && sized_sentinel_for<_Sent, _Iter>
+  {
+    auto __last = ranges::next(__first, __sent);
+    return pair{std::__unwrap_iter(std::move(__first)), std::__unwrap_iter(std::move(__last)).first};
+  }
+
+  _LIBCPP_HIDE_FROM_ABI static constexpr auto __unwrap(_Iter __first, _Sent __last) {
+    return pair{pair{std::move(__first), __move_only_iterator_tag{}}, std::move(__last)};
+  }
+};
+#endif
+
+template <class _Iter, class _Unwrapped = decltype(std::__unwrap_iter(std::declval<_Iter>()))>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR pair<_Unwrapped, decltype(_Unwrapped::first)>
+__unwrap_range(_Iter __first, _Iter __last) {
+  return std::make_pair(std::__unwrap_iter(__first), std::__unwrap_iter(__last).first);
+}
+
+#if _LIBCPP_STD_VER > 17
+template <class _Iter, class _Sent>
+_LIBCPP_HIDE_FROM_ABI constexpr auto __unwrap_range(_Iter __first, _Sent __last) {
+  return __unwrap_range_impl<_Iter, _Sent>::__unwrap(std::move(__first), std::move(__last));
+}
+#endif // _LIBCPP_STD_VER > 17
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___ALGORITHM_UNWRAP_RANGE_H
diff --git a/libcxx/include/__format/buffer.h b/libcxx/include/__format/buffer.h
--- a/libcxx/include/__format/buffer.h
+++ b/libcxx/include/__format/buffer.h
@@ -229,7 +229,7 @@
 
   _LIBCPP_HIDE_FROM_ABI explicit __format_buffer(_OutIt __out_it) requires(
       same_as<_Storage, __direct_storage<_CharT>>)
-      : __output_(_VSTD::__unwrap_iter(__out_it), size_t(-1), this),
+      : __output_(std::__unwrap_iter(__out_it).first, size_t(-1), this),
         __writer_(_VSTD::move(__out_it)) {}
 
   _LIBCPP_HIDE_FROM_ABI auto make_output_iterator() {
@@ -311,7 +311,7 @@
 
 public:
   _LIBCPP_HIDE_FROM_ABI explicit __format_to_n_buffer_base(_OutIt __out_it, _Size __n)
-      : __output_(_VSTD::__unwrap_iter(__out_it), __n, this), __writer_(_VSTD::move(__out_it)) {
+      : __output_(std::__unwrap_iter(__out_it).first, __n, this), __writer_(_VSTD::move(__out_it)) {
     if (__n <= 0) [[unlikely]]
       __output_.reset(__storage_.begin(), __storage_.__buffer_size);
   }
diff --git a/libcxx/include/__iterator/reverse_iterator.h b/libcxx/include/__iterator/reverse_iterator.h
--- a/libcxx/include/__iterator/reverse_iterator.h
+++ b/libcxx/include/__iterator/reverse_iterator.h
@@ -327,41 +327,16 @@
 
 template <class _Iter, bool __b>
 struct __unwrap_iter_impl<_ReverseWrapper<_Iter>, __b> {
-  static _LIBCPP_CONSTEXPR decltype(std::__unwrap_iter(std::declval<_Iter>()))
-  __apply(_ReverseWrapper<_Iter> __i) _NOEXCEPT {
-    return std::__unwrap_iter(__i.base().base());
-  }
-};
-
-template <class _OrigIter, class _UnwrappedIter>
-struct __rewrap_iter_impl<_ReverseWrapper<_OrigIter>, _UnwrappedIter> {
-  template <class _Iter>
-  struct _ReverseWrapperCount {
-    static _LIBCPP_CONSTEXPR const size_t value = 1;
-  };
-
-  template <class _Iter>
-  struct _ReverseWrapperCount<_ReverseWrapper<_Iter> > {
-    static _LIBCPP_CONSTEXPR const size_t value = 1 + _ReverseWrapperCount<_Iter>::value;
-  };
-
-  template <size_t _RewrapCount, class _OIter, class _UIter, __enable_if_t<_RewrapCount != 0, int> = 0>
-  _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR _ReverseWrapper<_OIter> __rewrap(_ReverseWrapper<_OIter> __iter1,
-                                                                                  _UIter __iter2) {
-    return _ReverseWrapper<_OIter>(
-        reverse_iterator<_OIter>(__rewrap<_RewrapCount - 1>(__iter1.base().base(), __iter2)));
-  }
+  using _UnwrappedIter = decltype(__unwrap_iter_impl<_Iter>::__unwrap(std::declval<_Iter>()));
 
-  template <size_t _RewrapCount, class _OIter, class _UIter, __enable_if_t<_RewrapCount == 0, int> = 0>
-  _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR decltype(std::__rewrap_iter(std::declval<_OIter>(),
-                                                                             std::declval<_UIter>()))
-  __rewrap(_OIter __iter1, _UIter __iter2) {
-    return std::__rewrap_iter(__iter1, __iter2);
+  static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _ReverseWrapper<_Iter>
+  __rewrap(_ReverseWrapper<_Iter> __orig_iter, _UnwrappedIter __unwrapped_iter) {
+    return _ReverseWrapper<_Iter>(
+        reverse_iterator<_Iter>(__unwrap_iter_impl<_Iter>::__rewrap(__orig_iter.base().base(), __unwrapped_iter)));
   }
 
-  _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR _ReverseWrapper<_OrigIter> __apply(_ReverseWrapper<_OrigIter> __iter1,
-                                                                                    _UnwrappedIter __iter2) {
-    return __rewrap<_ReverseWrapperCount<_OrigIter>::value>(__iter1, __iter2);
+  static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _UnwrappedIter __unwrap(_ReverseWrapper<_Iter> __i) _NOEXCEPT {
+    return __unwrap_iter_impl<_Iter>::__unwrap(__i.base().base());
   }
 };
 
diff --git a/libcxx/test/libcxx/iterators/unwrap_iter.pass.cpp b/libcxx/test/libcxx/iterators/unwrap_iter.pass.cpp
--- a/libcxx/test/libcxx/iterators/unwrap_iter.pass.cpp
+++ b/libcxx/test/libcxx/iterators/unwrap_iter.pass.cpp
@@ -21,7 +21,7 @@
 #include "test_macros.h"
 
 template <class Iter>
-using UnwrapT = decltype(std::__unwrap_iter(std::declval<Iter>()));
+using UnwrapT = decltype(std::__unwrap_iter(std::declval<Iter>()).first);
 
 template <class Iter>
 using rev_iter = std::reverse_iterator<Iter>;
@@ -45,10 +45,10 @@
   std::string str = "Banane";
   using Iter = std::string::iterator;
 
-  assert(std::__unwrap_iter(str.begin()) == str.data());
-  assert(std::__unwrap_iter(str.end()) == str.data() + str.size());
-  assert(std::__unwrap_iter(rev_rev_iter<Iter>(rev_iter<Iter>(str.begin()))) == str.data());
-  assert(std::__unwrap_iter(rev_rev_iter<Iter>(rev_iter<Iter>(str.end()))) == str.data() + str.size());
+  assert(std::__unwrap_iter(str.begin()).first == str.data());
+  assert(std::__unwrap_iter(str.end()).first == str.data() + str.size());
+  assert(std::__unwrap_iter(rev_rev_iter<Iter>(rev_iter<Iter>(str.begin()))).first == str.data());
+  assert(std::__unwrap_iter(rev_rev_iter<Iter>(rev_iter<Iter>(str.end()))).first == str.data() + str.size());
 
   return true;
 }
diff --git a/libcxx/test/std/algorithms/alg.modifying.operations/alg.copy/ranges.copy.pass.cpp b/libcxx/test/std/algorithms/alg.modifying.operations/alg.copy/ranges.copy.pass.cpp
--- a/libcxx/test/std/algorithms/alg.modifying.operations/alg.copy/ranges.copy.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.modifying.operations/alg.copy/ranges.copy.pass.cpp
@@ -95,13 +95,20 @@
   }
 }
 
+template <class In, class Out>
+constexpr void test_sentinels() {
+  test_iterators<In, Out>();
+  test_iterators<In, Out, sized_sentinel<In>>();
+  test_iterators<In, Out, sentinel_wrapper<In>>();
+}
+
 template <class Out>
 constexpr void test_in_iterators() {
   test_iterators<cpp20_input_iterator<int*>, Out, sentinel_wrapper<cpp20_input_iterator<int*>>>();
-  test_iterators<forward_iterator<int*>, Out>();
-  test_iterators<bidirectional_iterator<int*>, Out>();
-  test_iterators<random_access_iterator<int*>, Out>();
-  test_iterators<contiguous_iterator<int*>, Out>();
+  test_sentinels<forward_iterator<int*>, Out>();
+  test_sentinels<bidirectional_iterator<int*>, Out>();
+  test_sentinels<random_access_iterator<int*>, Out>();
+  test_sentinels<contiguous_iterator<int*>, Out>();
 }
 
 constexpr bool test() {