diff --git a/libcxx/include/__algorithm/ranges_for_each_n.h b/libcxx/include/__algorithm/ranges_for_each_n.h
--- a/libcxx/include/__algorithm/ranges_for_each_n.h
+++ b/libcxx/include/__algorithm/ranges_for_each_n.h
@@ -18,7 +18,6 @@
 #include <__iterator/iterator_traits.h>
 #include <__iterator/projected.h>
 #include <__ranges/concepts.h>
-#include <__ranges/dangling.h>
 #include <__utility/move.h>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
diff --git a/libcxx/include/__algorithm/ranges_generate_n.h b/libcxx/include/__algorithm/ranges_generate_n.h
--- a/libcxx/include/__algorithm/ranges_generate_n.h
+++ b/libcxx/include/__algorithm/ranges_generate_n.h
@@ -23,7 +23,6 @@
 #include <__iterator/projected.h>
 #include <__ranges/access.h>
 #include <__ranges/concepts.h>
-#include <__ranges/dangling.h>
 #include <__utility/forward.h>
 #include <__utility/move.h>
 
diff --git a/libcxx/include/__algorithm/ranges_includes.h b/libcxx/include/__algorithm/ranges_includes.h
--- a/libcxx/include/__algorithm/ranges_includes.h
+++ b/libcxx/include/__algorithm/ranges_includes.h
@@ -20,7 +20,6 @@
 #include <__iterator/projected.h>
 #include <__ranges/access.h>
 #include <__ranges/concepts.h>
-#include <__ranges/dangling.h>
 #include <__utility/forward.h>
 #include <__utility/move.h>
 
diff --git a/libcxx/include/__algorithm/ranges_is_heap.h b/libcxx/include/__algorithm/ranges_is_heap.h
--- a/libcxx/include/__algorithm/ranges_is_heap.h
+++ b/libcxx/include/__algorithm/ranges_is_heap.h
@@ -20,7 +20,6 @@
 #include <__iterator/projected.h>
 #include <__ranges/access.h>
 #include <__ranges/concepts.h>
-#include <__ranges/dangling.h>
 #include <__utility/forward.h>
 #include <__utility/move.h>
 
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_dangling.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_dangling.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/algorithms/ranges_robust_against_dangling.pass.cpp
@@ -0,0 +1,211 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// <algorithm>
+//
+// Range algorithms should return `std::ranges::dangling` when given a dangling range.
+
+#include <algorithm>
+
+#include <array>
+#include <concepts>
+#include <iterator>
+#include <ranges>
+#include <random>
+
+#include "test_iterators.h"
+
+struct NonBorrowedRange {
+  using Iter = int*;
+  using Sent = sentinel_wrapper<Iter>;
+
+  int* data_;
+  size_t size_;
+
+  template <size_t N>
+  constexpr explicit NonBorrowedRange(std::array<int, N>& arr) : data_{arr.data()}, size_{arr.size()} {}
+
+  constexpr Iter begin() const { return data_; };
+  constexpr Sent end() const { return Sent{data_ + size_}; };
+};
+
+using R = NonBorrowedRange;
+
+// (dangling_in, ...)
+template <class ExpectedT = std::ranges::dangling, class Func, std::ranges::range Input, class ...Args>
+constexpr void dangling_1st(Func&& func, Input& in, Args&& ...args) {
+  decltype(auto) result = func(R(in), std::forward<Args>(args)...);
+  static_assert(std::same_as<decltype(result), ExpectedT>);
+}
+
+// (in, dangling_in, ...)
+template <class ExpectedT = std::ranges::dangling, class Func, std::ranges::range Input, class ...Args>
+constexpr void dangling_2nd(Func&& func, Input& in1, Input& in2, Args&& ...args) {
+  decltype(auto) result = func(in1, R(in2), std::forward<Args>(args)...);
+  static_assert(std::same_as<decltype(result), ExpectedT>);
+}
+
+// (dangling_in1, dangling_in2, ...)
+template <class ExpectedT = std::ranges::dangling, class Func, std::ranges::range Input, class ...Args>
+constexpr void dangling_both(Func&& func, Input& in1, Input& in2, Args&& ...args) {
+  decltype(auto) result = func(R(in1), R(in2), std::forward<Args>(args)...);
+  static_assert(std::same_as<decltype(result), ExpectedT>);
+}
+
+// TODO: also check the iterator values for algorithms that return `*_result` types.
+constexpr bool test_all() {
+  using std::ranges::dangling;
+
+  using std::ranges::binary_transform_result;
+  using std::ranges::copy_result;
+  //using std::ranges::copy_backward_result;
+  using std::ranges::copy_if_result;
+  using std::ranges::for_each_result;
+  using std::ranges::merge_result;
+  using std::ranges::minmax_result;
+  using std::ranges::mismatch_result;
+  using std::ranges::move_result;
+  //using std::ranges::move_backward_result;
+  //using std::ranges::partial_sort_copy_result;
+  //using std::ranges::partition_copy_result;
+  //using std::ranges::remove_copy_result;
+  //using std::ranges::remove_copy_if_result;
+  using std::ranges::reverse_copy_result;
+  using std::ranges::rotate_copy_result;
+  using std::ranges::set_difference_result;
+  using std::ranges::set_intersection_result;
+  using std::ranges::set_symmetric_difference_result;
+  using std::ranges::set_union_result;
+  using std::ranges::swap_ranges_result;
+  using std::ranges::unary_transform_result;
+  //using std::ranges::unique_copy_result;
+
+  auto unary_pred = [](int i) { return i > 0; };
+  auto binary_pred = [](int i, int j) { return i < j; };
+  //auto gen = [] { return 42; };
+  //std::mt19937 rand_gen;
+
+  std::array in = {1, 2, 3};
+  std::array in2 = {4, 5, 6};
+
+  auto mid = in.begin() + 1;
+
+  std::array output = {7, 8, 9, 10, 11, 12};
+  auto out = output.begin();
+  //auto out2 = output.begin() + 1;
+
+  int x = 2;
+  size_t count = 1;
+
+  dangling_1st(std::ranges::find, in, x);
+  dangling_1st(std::ranges::find_if, in, unary_pred);
+  dangling_1st(std::ranges::find_if_not, in, unary_pred);
+  dangling_1st(std::ranges::find_first_of, in, in2);
+  dangling_1st(std::ranges::adjacent_find, in);
+  dangling_1st<mismatch_result<dangling, int*>>(std::ranges::mismatch, in, in2);
+  dangling_2nd<mismatch_result<int*, dangling>>(std::ranges::mismatch, in, in2);
+  dangling_both<mismatch_result<dangling, dangling>>(std::ranges::mismatch, in, in2);
+  //dangling_1st(std::ranges::partition_point, in, unary_pred);
+  dangling_1st(std::ranges::lower_bound, in, x);
+  dangling_1st(std::ranges::upper_bound, in, x);
+  //dangling_1st(std::ranges::equal_range, in, x);
+  dangling_1st(std::ranges::min_element, in);
+  dangling_1st(std::ranges::max_element, in);
+  dangling_1st<minmax_result<dangling>>(std::ranges::minmax_element, in);
+  dangling_1st(std::ranges::search, in, in2);
+  dangling_1st(std::ranges::search_n, in, count, x);
+  dangling_1st(std::ranges::find_end, in, in2);
+  dangling_1st(std::ranges::is_sorted_until, in);
+  //dangling_1st(std::ranges::is_heap_until, in);
+  dangling_1st<for_each_result<dangling, decltype(unary_pred)>>(std::ranges::for_each, in, unary_pred);
+  dangling_1st<copy_result<dangling, int*>>(std::ranges::copy, in, out);
+  // TODO: uncomment `copy_backward` once https://reviews.llvm.org/D128864 lands.
+  //dangling_1st<copy_backward_result<dangling, int*>>(std::ranges::copy_backward, in, out);
+  dangling_1st<copy_if_result<dangling, int*>>(std::ranges::copy_if, in, out, unary_pred);
+  dangling_1st<move_result<dangling, int*>>(std::ranges::move, in, out);
+  // TODO: uncomment `move_backward` once https://reviews.llvm.org/D128864 lands.
+  //dangling_1st<move_backward_result<dangling, int*>>(std::ranges::move_backward, in, out);
+  dangling_1st(std::ranges::fill, in, x);
+  { // transform
+    std::array out_transform = {false, true, true};
+    dangling_1st<unary_transform_result<dangling, bool*>>(std::ranges::transform, in, out_transform.begin(), unary_pred);
+    dangling_1st<binary_transform_result<dangling, int*, bool*>>(
+        std::ranges::transform, in, in2, out_transform.begin(), binary_pred);
+    dangling_2nd<binary_transform_result<int*, dangling, bool*>>(
+        std::ranges::transform, in, in2, out_transform.begin(), binary_pred);
+    dangling_both<binary_transform_result<dangling, dangling, bool*>>(
+        std::ranges::transform, in, in2, out_transform.begin(), binary_pred);
+  }
+  //dangling_1st(std::ranges::generate, in, gen);
+  //dangling_1st<remove_copy_result<dangling, int*>>(std::ranges::remove_copy, in, out, x);
+  //dangling_1st<remove_copy_if_result<dangling, int*>>(std::ranges::remove_copy_if, in, out, unary_pred);
+  dangling_1st(std::ranges::replace, in, x, x);
+  dangling_1st(std::ranges::replace_if, in, std::identity{}, x);
+  //dangling_1st(std::ranges::replace_copy, in, out, x, x);
+  //dangling_1st(std::ranges::replace_copy_if, in, out, x, x);
+  dangling_1st<swap_ranges_result<dangling, int*>>(std::ranges::swap_ranges, in, in2);
+  dangling_2nd<swap_ranges_result<int*, dangling>>(std::ranges::swap_ranges, in, in2);
+  dangling_both<swap_ranges_result<dangling, dangling>>(std::ranges::swap_ranges, in, in2);
+  dangling_1st<reverse_copy_result<dangling, int*>>(std::ranges::reverse_copy, in, out);
+  dangling_1st<rotate_copy_result<dangling, int*>>(std::ranges::rotate_copy, in, mid, out);
+  //dangling_1st<unique_copy_result<dangling, int*>>(std::ranges::unique_copy, in, out);
+  //dangling_1st<partition_copy_result<dangling, int*, int*>>std::ranges::partition_copy(in, out, out2, unary_pred);
+  //dangling_1st<partial_sort_copy_result<dangling, int*>>(std::ranges::partial_sort_copy, in, in2);
+  //dangling_2nd<partial_sort_copy_result<int*, dangling>>(std::ranges::partial_sort_copy, in, in2);
+  //dangling_both<partial_sort_copy_result<dangling, dangling>>(std::ranges::partial_sort_copy, in, in2);
+  dangling_1st<merge_result<dangling, int*, int*>>(std::ranges::merge, in, in2, out);
+  dangling_2nd<merge_result<int*, dangling, int*>>(std::ranges::merge, in, in2, out);
+  dangling_both<merge_result<dangling, dangling, int*>>(std::ranges::merge, in, in2, out);
+  dangling_1st<set_difference_result<dangling, int*>>(std::ranges::set_difference, in, in2, out);
+  dangling_1st<set_intersection_result<dangling, int*, int*>>(std::ranges::set_intersection, in, in2, out);
+  dangling_2nd<set_intersection_result<int*, dangling, int*>>(std::ranges::set_intersection, in, in2, out);
+  dangling_both<set_intersection_result<dangling, dangling, int*>>(std::ranges::set_intersection, in, in2, out);
+  dangling_1st<set_symmetric_difference_result<dangling, int*, int*>>(
+      std::ranges::set_symmetric_difference, in, in2, out);
+  dangling_2nd<set_symmetric_difference_result<int*, dangling, int*>>(
+      std::ranges::set_symmetric_difference, in, in2, out);
+  dangling_both<set_symmetric_difference_result<dangling, dangling, int*>>(
+      std::ranges::set_symmetric_difference, in, in2, out);
+  dangling_1st<set_union_result<dangling, int*, int*>>(std::ranges::set_union, in, in2, out);
+  dangling_2nd<set_union_result<int*, dangling, int*>>(std::ranges::set_union, in, in2, out);
+  dangling_both<set_union_result<dangling, dangling, int*>>(std::ranges::set_union, in, in2, out);
+  dangling_1st(std::ranges::remove, in, x);
+  dangling_1st(std::ranges::remove_if, in, unary_pred);
+  dangling_1st(std::ranges::reverse, in);
+  //dangling_1st(std::ranges::rotate, in, mid);
+  //dangling_1st(std::ranges::shuffle, in, rand_gen);
+  //dangling_1st(std::ranges::unique, in);
+  dangling_1st(std::ranges::partition, in, unary_pred);
+  if (!std::is_constant_evaluated())
+    dangling_1st(std::ranges::stable_partition, in, unary_pred);
+  dangling_1st(std::ranges::sort, in);
+  if (!std::is_constant_evaluated())
+    dangling_1st(std::ranges::stable_sort, in);
+  dangling_1st(std::ranges::partial_sort, in, mid);
+  dangling_1st(std::ranges::nth_element, in, mid);
+  //if (!std::is_constant_evaluated())
+  //  dangling_1st(std::ranges::inplace_merge, in, mid);
+  dangling_1st(std::ranges::make_heap, in);
+  dangling_1st(std::ranges::push_heap, in);
+  dangling_1st(std::ranges::pop_heap, in);
+  dangling_1st(std::ranges::sort_heap, in);
+  //dangling_1st(std::ranges::prev_permutation, in);
+  //dangling_1st(std::ranges::next_permutation, in);
+
+  return true;
+}
+
+int main(int, char**) {
+  test_all();
+  static_assert(test_all());
+
+  return 0;
+}
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.compile.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.compile.pass.cpp
deleted file mode 100644
--- a/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.compile.pass.cpp
+++ /dev/null
@@ -1,172 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// UNSUPPORTED: c++03, c++11, c++14, c++17
-// UNSUPPORTED: libcpp-has-no-incomplete-ranges
-
-// <algorithm>
-//
-// Range algorithms that take predicates should support predicates that return a non-boolean value as long as the
-// returned type is implicitly convertible to bool.
-
-#include <algorithm>
-
-#include <array>
-#include <concepts>
-#include <initializer_list>
-#include <iterator>
-#include <ranges>
-
-#include "boolean_testable.h"
-
-auto unary_pred = [](int i) { return BooleanTestable(i > 0); };
-static_assert(!std::same_as<decltype(unary_pred(1)), bool>);
-static_assert(std::convertible_to<decltype(unary_pred(1)), bool>);
-
-auto binary_pred = [](int i, int j) { return BooleanTestable(i < j); };
-static_assert(!std::same_as<decltype(binary_pred(1, 2)), bool>);
-static_assert(std::convertible_to<decltype(binary_pred(1, 2)), bool>);
-
-// There are only a few typical signatures shared by most algorithms -- this set of helpers invokes both the
-// (iterator, sentinel, ...) and the (range, ...) overloads of the given niebloid.
-
-// (in, pred)
-template <class Func, std::ranges::range Input, class Pred>
-void in_pred(Func&& func, Input& in, Pred& pred) {
-  func(in.begin(), in.end(), pred);
-  func(in, pred);
-}
-
-// (in, val, pred)
-template <class Func, std::ranges::range Input, class T, class Pred>
-void in_val_pred(Func&& func, Input& in, T& value, Pred& pred) {
-  func(in.begin(), in.end(), value, pred);
-  func(in, value, pred);
-}
-
-// (in, out, pred)
-template <class Func, std::ranges::range Input, std::weakly_incrementable Output, class Pred>
-void in_out_pred(Func&& func, Input& in, Output& out, Pred& pred) {
-  func(in.begin(), in.end(), out, pred);
-  func(in, out, pred);
-}
-
-// (in1, in2, pred)
-template <class Func, std::ranges::range Input, class Pred>
-void in2_pred(Func&& func, Input& in1, Input& in2, Pred& pred) {
-  func(in1.begin(), in1.end(), in2.begin(), in2.end(), pred);
-  func(in1, in2, pred);
-}
-
-// (in1, in2, out, pred)
-template <class Func, std::ranges::range Input, std::weakly_incrementable Output, class Pred>
-void in2_out_pred(Func&& func, Input& in1, Input& in2, Output& out, Pred& pred) {
-  func(in1.begin(), in1.end(), in2.begin(), in2.end(), out, pred);
-  func(in1, in2, out, pred);
-}
-
-// (in, mid, pred)
-template <class Func, std::ranges::range Input, class Pred>
-void in_mid_pred(Func&& func, Input& in, std::ranges::iterator_t<Input>& mid, Pred& pred) {
-  func(in.begin(), mid, in.end(), pred);
-  func(in, mid, pred);
-}
-
-void test_all() {
-  std::array in = {1, 2, 3};
-  std::array in2 = {4, 5, 6};
-  auto mid = in.begin() + 1;
-
-  std::array output = {4, 5, 6};
-  auto out = output.begin();
-  //auto out2 = output.begin() + 1;
-
-  int x = 2;
-  int count = 1;
-
-  in_pred(std::ranges::any_of, in, unary_pred);
-  in_pred(std::ranges::all_of, in, unary_pred);
-  in_pred(std::ranges::none_of, in, unary_pred);
-  in_pred(std::ranges::find_if, in, unary_pred);
-  in_pred(std::ranges::find_if_not, in, unary_pred);
-  in2_pred(std::ranges::find_first_of, in, in2, binary_pred);
-  in_pred(std::ranges::adjacent_find, in, binary_pred);
-  in2_pred(std::ranges::mismatch, in, in2, binary_pred);
-  in2_pred(std::ranges::equal, in, in2, binary_pred);
-  in2_pred(std::ranges::lexicographical_compare, in, in2, binary_pred);
-  //in_pred(std::ranges::partition_point, unary_pred);
-  in_val_pred(std::ranges::lower_bound, in, x, binary_pred);
-  in_val_pred(std::ranges::upper_bound, in, x, binary_pred);
-  //in_val_pred(std::ranges::equal_range, in, x, binary_pred);
-  in_val_pred(std::ranges::binary_search, in, x, binary_pred);
-
-  // min
-  std::ranges::min(1, 2, binary_pred);
-  std::ranges::min(std::initializer_list<int>{1, 2}, binary_pred);
-  std::ranges::min(in, binary_pred);
-  // max
-  std::ranges::max(1, 2, binary_pred);
-  std::ranges::max(std::initializer_list<int>{1, 2}, binary_pred);
-  std::ranges::max(in, binary_pred);
-  // minmax
-  std::ranges::minmax(1, 2, binary_pred);
-  std::ranges::minmax(std::initializer_list<int>{1, 2}, binary_pred);
-  std::ranges::minmax(in, binary_pred);
-
-  in_pred(std::ranges::min_element, in, binary_pred);
-  in_pred(std::ranges::max_element, in, binary_pred);
-  in_pred(std::ranges::minmax_element, in, binary_pred);
-  in_pred(std::ranges::count_if, in, unary_pred);
-  //in2_pred(std::ranges::search, in, in2, binary_pred);
-  std::ranges::search_n(in.begin(), in.end(), count, x, binary_pred);
-  std::ranges::search_n(in, count, x, binary_pred);
-  in2_pred(std::ranges::find_end, in, in2, binary_pred);
-  in_pred(std::ranges::is_partitioned, in, unary_pred);
-  in_pred(std::ranges::is_sorted, in, binary_pred);
-  in_pred(std::ranges::is_sorted_until, in, binary_pred);
-  //in2_pred(std::ranges::includes, in, in2, binary_pred);
-  //in_pred(std::ranges::is_heap, in, binary_pred);
-  //in_pred(std::ranges::is_heap_until, in, binary_pred);
-  //std::ranges::clamp(2, 1, 3, binary_pred);
-  //in2_pred(std::ranges::is_permutation, in, in2, binary_pred);
-  in_out_pred(std::ranges::copy_if, in, out, unary_pred);
-  //in_out_pred(std::ranges::remove_copy_if, in, out, unary_pred);
-
-  // replace_if
-  //std::ranges::replace_if(in.begin(), in.end(), unary_pred, x);
-  //std::ranges::replace_if(in, unary_pred, x);
-  // replace_copy_if
-  //std::ranges::replace_copy_if(in.begin(), in.end(), out, unary_pred, x);
-  //std::ranges::replace_copy_if(in, out, unary_pred, x);
-
-  //in_out_pred(std::ranges::unique_copy, in, out, binary_pred);
-  // partition_copy
-  //std::ranges::partition_copy(in.begin(), in.end(), out, out2, unary_pred);
-  //std::ranges::partition_copy(in, out, out2, unary_pred);
-  //in2_pred(std::ranges::partial_sort_copy, in, in2, binary_pred);
-  in2_out_pred(std::ranges::merge, in, in2, out, binary_pred);
-  in2_out_pred(std::ranges::set_difference, in, in2, out, binary_pred);
-  in2_out_pred(std::ranges::set_intersection, in, in2, out, binary_pred);
-  in2_out_pred(std::ranges::set_symmetric_difference, in, in2, out, binary_pred);
-  in2_out_pred(std::ranges::set_union, in, in2, out, binary_pred);
-  in_pred(std::ranges::remove_if, in, unary_pred);
-  //in_pred(std::ranges::unique, in, binary_pred);
-  in_pred(std::ranges::partition, in, unary_pred);
-  in_pred(std::ranges::stable_partition, in, unary_pred);
-  in_pred(std::ranges::sort, in, binary_pred);
-  in_pred(std::ranges::stable_sort, in, binary_pred);
-  in_mid_pred(std::ranges::partial_sort, in, mid, binary_pred);
-  in_mid_pred(std::ranges::nth_element, in, mid, binary_pred);
-  //in_mid_pred(std::ranges::inplace_merge, in, mid, binary_pred);
-  in_pred(std::ranges::make_heap, in, binary_pred);
-  in_pred(std::ranges::push_heap, in, binary_pred);
-  in_pred(std::ranges::pop_heap, in, binary_pred);
-  in_pred(std::ranges::sort_heap, in, binary_pred);
-  //in_pred(std::ranges::prev_permutation, in, binary_pred);
-  //in_pred(std::ranges::next_permutation, in, binary_pred);
-}
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/algorithms/ranges_robust_against_nonbool_predicates.pass.cpp
@@ -0,0 +1,152 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// <algorithm>
+//
+// Range algorithms that take predicates should support predicates that return a non-boolean value as long as the
+// returned type is implicitly convertible to bool.
+
+#include <algorithm>
+
+#include <array>
+#include <concepts>
+#include <initializer_list>
+#include <iterator>
+#include <ranges>
+
+#include "boolean_testable.h"
+
+auto unary_pred = [](int i) { return BooleanTestable(i > 0); };
+static_assert(!std::same_as<decltype(unary_pred(1)), bool>);
+static_assert(std::convertible_to<decltype(unary_pred(1)), bool>);
+
+auto binary_pred = [](int i, int j) { return BooleanTestable(i < j); };
+static_assert(!std::same_as<decltype(binary_pred(1, 2)), bool>);
+static_assert(std::convertible_to<decltype(binary_pred(1, 2)), bool>);
+
+// Invokes both the (iterator, sentinel, ...) and the (range, ...) overloads of the given niebloid.
+
+// (in, ...)
+template <class Func, std::ranges::range Input, class ...Args>
+constexpr void test(Func&& func, Input& in, Args&& ...args) {
+  func(in.begin(), in.end(), std::forward<Args>(args)...);
+  func(in, std::forward<Args>(args)...);
+}
+
+// (in1, in2, ...)
+template <class Func, std::ranges::range Input, class ...Args>
+constexpr void test(Func&& func, Input& in1, Input& in2, Args&& ...args) {
+  func(in1.begin(), in1.end(), in2.begin(), in2.end(), std::forward<Args>(args)...);
+  func(in1, in2, std::forward<Args>(args)...);
+}
+
+// (in, mid, ...)
+template <class Func, std::ranges::range Input, class ...Args>
+constexpr void test_mid(Func&& func, Input& in, std::ranges::iterator_t<Input> mid, Args&& ...args) {
+  func(in.begin(), mid, in.end(), std::forward<Args>(args)...);
+  func(in, mid, std::forward<Args>(args)...);
+}
+
+constexpr bool test_all() {
+  std::array in = {1, 2, 3};
+  std::array in2 = {4, 5, 6};
+  auto mid = in.begin() + 1;
+
+  std::array output = {7, 8, 9, 10, 11, 12};
+  auto out = output.begin();
+  //auto out2 = output.begin() + 1;
+
+  int x = 2;
+  int count = 1;
+
+  test(std::ranges::any_of, in, unary_pred);
+  test(std::ranges::all_of, in, unary_pred);
+  test(std::ranges::none_of, in, unary_pred);
+  test(std::ranges::find_if, in, unary_pred);
+  test(std::ranges::find_if_not, in, unary_pred);
+  test(std::ranges::find_first_of, in, in2, binary_pred);
+  test(std::ranges::adjacent_find, in, binary_pred);
+  test(std::ranges::mismatch, in, in2, binary_pred);
+  test(std::ranges::equal, in, in2, binary_pred);
+  test(std::ranges::lexicographical_compare, in, in2, binary_pred);
+  //test(std::ranges::partition_point, unary_pred);
+  test(std::ranges::lower_bound, in, x, binary_pred);
+  test(std::ranges::upper_bound, in, x, binary_pred);
+  //test(std::ranges::equal_range, in, x, binary_pred);
+  test(std::ranges::binary_search, in, x, binary_pred);
+
+  // min
+  std::ranges::min(1, 2, binary_pred);
+  std::ranges::min(std::initializer_list<int>{1, 2}, binary_pred);
+  std::ranges::min(in, binary_pred);
+  // max
+  std::ranges::max(1, 2, binary_pred);
+  std::ranges::max(std::initializer_list<int>{1, 2}, binary_pred);
+  std::ranges::max(in, binary_pred);
+  // minmax
+  std::ranges::minmax(1, 2, binary_pred);
+  std::ranges::minmax(std::initializer_list<int>{1, 2}, binary_pred);
+  std::ranges::minmax(in, binary_pred);
+
+  test(std::ranges::min_element, in, binary_pred);
+  test(std::ranges::max_element, in, binary_pred);
+  test(std::ranges::minmax_element, in, binary_pred);
+  test(std::ranges::count_if, in, unary_pred);
+  test(std::ranges::search, in, in2, binary_pred);
+  test(std::ranges::search_n, in, count, x, binary_pred);
+  test(std::ranges::find_end, in, in2, binary_pred);
+  test(std::ranges::is_partitioned, in, unary_pred);
+  test(std::ranges::is_sorted, in, binary_pred);
+  test(std::ranges::is_sorted_until, in, binary_pred);
+  //test(std::ranges::includes, in, in2, binary_pred);
+  //test(std::ranges::is_heap, in, binary_pred);
+  //test(std::ranges::is_heap_until, in, binary_pred);
+  //std::ranges::clamp(2, 1, 3, binary_pred);
+  //test(std::ranges::is_permutation, in, in2, binary_pred);
+  test(std::ranges::copy_if, in, out, unary_pred);
+  //test(std::ranges::remove_copy_if, in, out, unary_pred);
+  test(std::ranges::replace_if, in, unary_pred, x);
+  //test(std::ranges::replace_copy_if, in, out, unary_pred, x);
+  //test(std::ranges::unique_copy, in, out, binary_pred);
+  //test(std::ranges::partition_copy, in, out, out2, unary_pred);
+  //test(std::ranges::partial_sort_copy, in, in2, binary_pred);
+  test(std::ranges::merge, in, in2, out, binary_pred);
+  test(std::ranges::set_difference, in, in2, out, binary_pred);
+  test(std::ranges::set_intersection, in, in2, out, binary_pred);
+  test(std::ranges::set_symmetric_difference, in, in2, out, binary_pred);
+  test(std::ranges::set_union, in, in2, out, binary_pred);
+  test(std::ranges::remove_if, in, unary_pred);
+  //test(std::ranges::unique, in, binary_pred);
+  test(std::ranges::partition, in, unary_pred);
+  if (!std::is_constant_evaluated())
+    test(std::ranges::stable_partition, in, unary_pred);
+  test(std::ranges::sort, in, binary_pred);
+  if (!std::is_constant_evaluated())
+    test(std::ranges::stable_sort, in, binary_pred);
+  test_mid(std::ranges::partial_sort, in, mid, binary_pred);
+  test_mid(std::ranges::nth_element, in, mid, binary_pred);
+  //test_mid(std::ranges::inplace_merge, in, mid, binary_pred);
+  test(std::ranges::make_heap, in, binary_pred);
+  test(std::ranges::push_heap, in, binary_pred);
+  test(std::ranges::pop_heap, in, binary_pred);
+  test(std::ranges::sort_heap, in, binary_pred);
+  //test(std::ranges::prev_permutation, in, binary_pred);
+  //test(std::ranges::next_permutation, in, binary_pred);
+
+  return true;
+}
+
+int main(int, char**) {
+  test_all();
+  static_assert(test_all());
+
+  return 0;
+}
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.compile.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.compile.pass.cpp
deleted file mode 100644
--- a/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.compile.pass.cpp
+++ /dev/null
@@ -1,217 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-// UNSUPPORTED: c++03, c++11, c++14, c++17
-// UNSUPPORTED: libcpp-has-no-incomplete-ranges
-
-// <algorithm>
-//
-// Range algorithms should use `std::invoke` to call the given projection(s) (and predicates, where applicable).
-
-#include <algorithm>
-
-#include <array>
-#include <concepts>
-#include <initializer_list>
-#include <iterator>
-#include <ranges>
-
-struct Foo {
-  int val;
-  constexpr bool unary_pred() const { return val > 0; }
-  constexpr bool binary_pred(const Foo& rhs) const { return val < rhs.val; }
-  constexpr auto operator<=>(const Foo&) const = default;
-};
-
-struct Bar {
-  Foo val;
-  Bar create() const { return Bar(); }
-};
-
-// There are only a few typical signatures shared by most algorithms -- this set of helpers invokes both the
-// (iterator, sentinel, ...) and the (range, ...) overloads of the given niebloid.
-
-// (in, val)
-template <class Func, std::ranges::range Input, class T, class Proj>
-void in_val(Func&& func, Input& in, const T& val, Proj&& proj) {
-  func(in.begin(), in.end(), val, proj);
-  func(in, val, proj);
-}
-
-// (in, pred)
-template <class Func, std::ranges::range Input, class Pred, class Proj>
-void in_pred(Func&& func, Input& in, Pred&& pred, Proj&& proj) {
-  func(in.begin(), in.end(), pred, proj);
-  func(in, pred, proj);
-}
-
-// (in, val, pred)
-template <class Func, std::ranges::range Input, class T, class Pred, class Proj>
-void in_val_pred(Func&& func, Input& in, const T& val, Pred&& pred, Proj&& proj) {
-  func(in.begin(), in.end(), val, pred, proj);
-  func(in, val, pred, proj);
-}
-
-// (in1, in2, pred) -- two projections.
-template <class Func, std::ranges::range Input, class Pred, class Proj1, class Proj2>
-void in2_pred(Func&& func, Input& in1, Input& in2, Pred&& pred, Proj1&& proj1, Proj2&& proj2) {
-  func(in1.begin(), in1.end(), in2.begin(), in2.end(), pred, proj1, proj2);
-  func(in1, in2, pred, proj1, proj2);
-}
-
-// (in, out, pred)
-template <class Func, std::ranges::range Input, std::weakly_incrementable Output, class Pred, class Proj>
-void in_out_pred(Func&& func, Input& in, Output out, Pred&& pred, Proj&& proj) {
-  func(in.begin(), in.end(), out, pred, proj);
-  func(in, out, pred, proj);
-}
-
-// (in, mid, pred)
-template <class Func, std::ranges::range Input, std::input_iterator Iter, class Pred, class Proj>
-void in_mid_pred(Func&& func, Input& in, Iter mid, Pred&& pred, Proj&& proj) {
-  func(in.begin(), mid, in.end(), pred, proj);
-  func(in, mid, pred, proj);
-}
-
-// (in1, in2, out, pred) -- two projections.
-template <class Func, std::ranges::range Input, std::weakly_incrementable Output, class Pred, class Proj1, class Proj2>
-void in2_out_pred(Func&& func, Input& in1, Input& in2, Output out, Pred&& pred, Proj1&& proj1, Proj2&& proj2) {
-  func(in1.begin(), in1.end(), in2.begin(), in2.end(), out, pred, proj1, proj2);
-  func(in1, in2, out, pred, proj1, proj2);
-}
-
-void test_all() {
-  std::array in = {Bar{Foo{1}}, Bar{Foo{2}}, Bar{Foo{3}}};
-  std::array in2 = {Bar{Foo{4}}, Bar{Foo{5}}, Bar{Foo{6}}};
-  auto mid = in.begin() + 1;
-
-  std::array output = {Bar{Foo{4}}, Bar{Foo{5}}, Bar{Foo{6}}};
-  auto out = output.begin();
-  //auto out2 = output.begin() + 1;
-
-  Bar a{Foo{1}};
-  Bar b{Foo{2}};
-  //Bar c{Foo{3}};
-
-  Foo x{2};
-  size_t count = 1;
-
-  in_pred(std::ranges::any_of, in, &Foo::unary_pred, &Bar::val);
-  in_pred(std::ranges::all_of, in, &Foo::unary_pred, &Bar::val);
-  in_pred(std::ranges::none_of, in, &Foo::unary_pred, &Bar::val);
-  in_val(std::ranges::find, in, x, &Bar::val);
-  in_pred(std::ranges::find_if, in, &Foo::unary_pred, &Bar::val);
-  in_pred(std::ranges::find_if_not, in, &Foo::unary_pred, &Bar::val);
-  in2_pred(std::ranges::find_first_of, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in_pred(std::ranges::adjacent_find, in, &Foo::binary_pred, &Bar::val);
-  in2_pred(std::ranges::mismatch, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in2_pred(std::ranges::equal, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in2_pred(std::ranges::lexicographical_compare, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
-  //in_pred(std::ranges::partition_point, in, &Foo::unary_pred, &Bar::val);
-  in_val_pred(std::ranges::lower_bound, in, x, &Foo::binary_pred, &Bar::val);
-  in_val_pred(std::ranges::upper_bound, in, x, &Foo::binary_pred, &Bar::val);
-  //in_val_pred(std::ranges::equal_range, in, x, &Foo::binary_pred, &Bar::val);
-  in_val_pred(std::ranges::binary_search, in, x, &Foo::binary_pred, &Bar::val);
-
-  // min
-  std::ranges::min(a, b, &Foo::binary_pred, &Bar::val);
-  std::ranges::min(std::initializer_list<Bar>{a, b}, &Foo::binary_pred, &Bar::val);
-  std::ranges::min(in, &Foo::binary_pred, &Bar::val);
-  // max
-  std::ranges::max(a, b, &Foo::binary_pred, &Bar::val);
-  std::ranges::max(std::initializer_list<Bar>{a, b}, &Foo::binary_pred, &Bar::val);
-  std::ranges::max(in, &Foo::binary_pred, &Bar::val);
-  // minmax
-  std::ranges::minmax(a, b, &Foo::binary_pred, &Bar::val);
-  std::ranges::minmax(std::initializer_list<Bar>{a, b}, &Foo::binary_pred, &Bar::val);
-  std::ranges::minmax(in, &Foo::binary_pred, &Bar::val);
-
-  in_pred(std::ranges::min_element, in, &Foo::binary_pred, &Bar::val);
-  in_pred(std::ranges::max_element, in, &Foo::binary_pred, &Bar::val);
-  in_pred(std::ranges::minmax_element, in, &Foo::binary_pred, &Bar::val);
-  in_val(std::ranges::count, in, x, &Bar::val);
-  in_pred(std::ranges::count_if, in, &Foo::unary_pred, &Bar::val);
-  in2_pred(std::ranges::search, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
-  // search_n
-  std::ranges::search_n(in.begin(), in.end(), count, x, &Foo::binary_pred, &Bar::val);
-  std::ranges::search_n(in, count, x, &Foo::binary_pred, &Bar::val);
-  in2_pred(std::ranges::find_end, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in_pred(std::ranges::is_partitioned, in, &Foo::unary_pred, &Bar::val);
-  in_pred(std::ranges::is_sorted, in, &Foo::binary_pred, &Bar::val);
-  in_pred(std::ranges::is_sorted_until, in, &Foo::binary_pred, &Bar::val);
-  //in2_pred(std::ranges::includes, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
-  //in_pred(std::ranges::is_heap, in, &Foo::binary_pred, &Bar::val);
-  //in_pred(std::ranges::is_heap_until, in, &Foo::binary_pred, &Bar::val);
-  //std::ranges::clamp(b, a, c, &Foo::binary_pred);
-  //in2_pred(std::ranges::is_permutation, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in_pred(std::ranges::for_each, in, &Foo::unary_pred, &Bar::val);
-  std::ranges::for_each_n(in.begin(), count, &Foo::unary_pred, &Bar::val);
-  // `copy`, `copy_n` and `copy_backward` have neither a projection nor a predicate.
-  in_out_pred(std::ranges::copy_if, in, out, &Foo::unary_pred, &Bar::val);
-  // `move` and `move_backward` have neither a projection nor a predicate.
-  // `fill` and `fill_n` have neither a projection nor a predicate.
-  {
-    std::array out_transform = {false, true, true};
-    in_out_pred(std::ranges::transform, in, out_transform.begin(), &Foo::unary_pred, &Bar::val);
-  }
-  // generate
-  //std::ranges::generate(in.begin(), in.end(), &Bar::create);
-  //std::ranges::generate(in, &Bar::create);
-  // generate_n
-  //std::ranges::generate(in.begin(), count, &Bar::create);
-  // remove_copy
-  //std::ranges::remove_copy(in.begin(), in.end(), out, x, &Bar::val);
-  //std::ranges::remove_copy(in, out, x, &Bar::val);
-  //in_out_pred(std::ranges::remove_copy_if, in, out, &Foo::unary_pred, &Bar::val);
-  // `replace*` algorithms only use the projection to compare the elements, not to write them.
-  // replace
-  std::ranges::replace(in.begin(), in.end(), x, a, &Bar::val);
-  std::ranges::replace(in, x, a, &Bar::val);
-  // replace_if
-  std::ranges::replace_if(in.begin(), in.end(), &Foo::unary_pred, a, &Bar::val);
-  std::ranges::replace_if(in, &Foo::unary_pred, a, &Bar::val);
-  // replace_copy
-  //std::ranges::replace_copy(in.begin(), in.end(), out, x, a, &Bar::val);
-  //std::ranges::replace_copy(in, out, x, a, &Bar::val);
-  // replace_copy_if
-  //std::ranges::replace_copy_if(in.begin(), in.end(), out, pred, a, &Bar::val);
-  //std::ranges::replace_copy_if(in, out, pred, a, &Bar::val);
-  // `swap_ranges` has neither a projection nor a predicate.
-  // `reverse_copy` has neither a projection nor a predicate.
-  // `rotate_copy` has neither a projection nor a predicate.
-  // `sample` has no requirement that the given generator be invoked via `std::invoke`.
-  //in_out_pred(std::ranges::unique_copy, in, out, &Foo::binary_pred, &Bar::val);
-  // partition_copy
-  //std::ranges::partition_copy(in.begin(), in.end(), out, out2, &Foo::unary_pred, &Bar::val);
-  //std::ranges::partition_copy(in, out, out2, &Foo::unary_pred, &Bar::val);
-  //in2_pred(std::ranges::partial_sort_copy, in, in2, &Foo::binary_pred, &Bar::val);
-  in2_out_pred(std::ranges::merge, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in2_out_pred(std::ranges::set_difference, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in2_out_pred(std::ranges::set_intersection, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in2_out_pred(std::ranges::set_symmetric_difference, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in2_out_pred(std::ranges::set_union, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
-  in_val(std::ranges::remove, in, x, &Bar::val);
-  in_pred(std::ranges::remove_if, in, &Foo::unary_pred, &Bar::val);
-  // `reverse` has neither a projection nor a predicate.
-  // `rotate` has neither a projection nor a predicate.
-  // `shuffle` has neither a projection nor a predicate.
-  //in_pred(std::ranges::unique, in, &Foo::binary_pred, &Bar::val);
-  in_pred(std::ranges::partition, in, &Foo::unary_pred, &Bar::val);
-  in_pred(std::ranges::stable_partition, in, &Foo::unary_pred, &Bar::val);
-  in_pred(std::ranges::sort, in, &Foo::binary_pred, &Bar::val);
-  in_pred(std::ranges::stable_sort, in, &Foo::binary_pred, &Bar::val);
-  in_mid_pred(std::ranges::partial_sort, in, mid, &Foo::binary_pred, &Bar::val);
-  in_mid_pred(std::ranges::nth_element, in, mid, &Foo::binary_pred, &Bar::val);
-  //in_mid_pred(std::ranges::inplace_merge, in, mid, binary_pred);
-  in_pred(std::ranges::make_heap, in, &Foo::binary_pred, &Bar::val);
-  in_pred(std::ranges::push_heap, in, &Foo::binary_pred, &Bar::val);
-  in_pred(std::ranges::pop_heap, in, &Foo::binary_pred, &Bar::val);
-  in_pred(std::ranges::sort_heap, in, &Foo::binary_pred, &Bar::val);
-  //in_pred(std::ranges::prev_permutation, in, &Foo::binary_pred, &Bar::val);
-  //in_pred(std::ranges::next_permutation, in, &Foo::binary_pred, &Bar::val);
-}
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.pass.cpp
@@ -0,0 +1,182 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
+// <algorithm>
+//
+// Range algorithms should use `std::invoke` to call the given projection(s) (and predicates, where applicable).
+
+#include <algorithm>
+
+#include <array>
+#include <concepts>
+#include <initializer_list>
+#include <iterator>
+#include <ranges>
+
+struct Foo {
+  int val;
+  constexpr bool unary_pred() const { return val > 0; }
+  constexpr bool binary_pred(const Foo& rhs) const { return val < rhs.val; }
+  constexpr auto operator<=>(const Foo&) const = default;
+};
+
+struct Bar {
+  Foo val;
+  Bar create() const { return Bar(); }
+};
+
+// Invokes both the (iterator, sentinel, ...) and the (range, ...) overloads of the given niebloid.
+
+// (in, ...)
+template <class Func, std::ranges::range Input, class ...Args>
+constexpr void test(Func&& func, Input& in, Args&& ...args) {
+  func(in.begin(), in.end(), std::forward<Args>(args)...);
+  func(in, std::forward<Args>(args)...);
+}
+
+// (in1, in2, ...)
+template <class Func, std::ranges::range Input, class ...Args>
+constexpr void test(Func&& func, Input& in1, Input& in2, Args&& ...args) {
+  func(in1.begin(), in1.end(), in2.begin(), in2.end(), std::forward<Args>(args)...);
+  func(in1, in2, std::forward<Args>(args)...);
+}
+
+// (in, mid, ...)
+template <class Func, std::ranges::range Input, class ...Args>
+constexpr void test_mid(Func&& func, Input& in, std::ranges::iterator_t<Input> mid, Args&& ...args) {
+  func(in.begin(), mid, in.end(), std::forward<Args>(args)...);
+  func(in, mid, std::forward<Args>(args)...);
+}
+
+constexpr bool test_all() {
+  std::array in = {Bar{Foo{1}}, Bar{Foo{2}}, Bar{Foo{3}}};
+  std::array in2 = {Bar{Foo{4}}, Bar{Foo{5}}, Bar{Foo{6}}};
+  auto mid = in.begin() + 1;
+
+  std::array output = {Bar{Foo{7}}, Bar{Foo{8}}, Bar{Foo{9}}, Bar{Foo{10}}, Bar{Foo{11}}, Bar{Foo{12}}};
+  auto out = output.begin();
+  //auto out2 = output.begin() + 1;
+
+  Bar a{Foo{1}};
+  Bar b{Foo{2}};
+  //Bar c{Foo{3}};
+
+  Foo x{2};
+  size_t count = 1;
+
+  test(std::ranges::any_of, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::all_of, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::none_of, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::find, in, x, &Bar::val);
+  test(std::ranges::find_if, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::find_if_not, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::find_first_of, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::adjacent_find, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::mismatch, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::equal, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::lexicographical_compare, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
+  //test(std::ranges::partition_point, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::lower_bound, in, x, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::upper_bound, in, x, &Foo::binary_pred, &Bar::val);
+  //test(std::ranges::equal_range, in, x, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::binary_search, in, x, &Foo::binary_pred, &Bar::val);
+
+  // min
+  std::ranges::min(a, b, &Foo::binary_pred, &Bar::val);
+  std::ranges::min(std::initializer_list<Bar>{a, b}, &Foo::binary_pred, &Bar::val);
+  std::ranges::min(in, &Foo::binary_pred, &Bar::val);
+  // max
+  std::ranges::max(a, b, &Foo::binary_pred, &Bar::val);
+  std::ranges::max(std::initializer_list<Bar>{a, b}, &Foo::binary_pred, &Bar::val);
+  std::ranges::max(in, &Foo::binary_pred, &Bar::val);
+  // minmax
+  std::ranges::minmax(a, b, &Foo::binary_pred, &Bar::val);
+  std::ranges::minmax(std::initializer_list<Bar>{a, b}, &Foo::binary_pred, &Bar::val);
+  std::ranges::minmax(in, &Foo::binary_pred, &Bar::val);
+
+  test(std::ranges::min_element, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::max_element, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::minmax_element, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::count, in, x, &Bar::val);
+  test(std::ranges::count_if, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::search, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::search_n, in, count, x, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::find_end, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::is_partitioned, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::is_sorted, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::is_sorted_until, in, &Foo::binary_pred, &Bar::val);
+  //test(std::ranges::includes, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
+  //test(std::ranges::is_heap, in, &Foo::binary_pred, &Bar::val);
+  //test(std::ranges::is_heap_until, in, &Foo::binary_pred, &Bar::val);
+  //std::ranges::clamp(b, a, c, &Foo::binary_pred);
+  //test(std::ranges::is_permutation, in, in2, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::for_each, in, &Foo::unary_pred, &Bar::val);
+  std::ranges::for_each_n(in.begin(), count, &Foo::unary_pred, &Bar::val);
+  // `copy`, `copy_n` and `copy_backward` have neither a projection nor a predicate.
+  test(std::ranges::copy_if, in, out, &Foo::unary_pred, &Bar::val);
+  // `move` and `move_backward` have neither a projection nor a predicate.
+  // `fill` and `fill_n` have neither a projection nor a predicate.
+  {
+    std::array out_transform = {false, true, true};
+    test(std::ranges::transform, in, out_transform.begin(), &Foo::unary_pred, &Bar::val);
+  }
+  //test(std::ranges::generate, in, &Bar::create);
+  //std::ranges::generate_n(in.begin(), count, &Bar::create);
+  //test(std::ranges::remove_copy, in, out, x, &Bar::val);
+  //test(std::ranges::remove_copy_if, in, out, &Foo::unary_pred, &Bar::val);
+  // `replace*` algorithms only use the projection to compare the elements, not to write them.
+  test(std::ranges::replace, in, x, a, &Bar::val);
+  test(std::ranges::replace_if, in, &Foo::unary_pred, a, &Bar::val);
+  //test(std::ranges::replace_copy, in, out, x, a, &Bar::val);
+  //test(std::ranges::replace_copy_if, in, out, pred, a, &Bar::val);
+  // `swap_ranges` has neither a projection nor a predicate.
+  // `reverse_copy` has neither a projection nor a predicate.
+  // `rotate_copy` has neither a projection nor a predicate.
+  // `sample` has no requirement that the given generator be invoked via `std::invoke`.
+  //test(std::ranges::unique_copy, in, out, &Foo::binary_pred, &Bar::val);
+  //test(std::ranges::partition_copy, in, out, out2, &Foo::unary_pred, &Bar::val);
+  //test(std::ranges::partial_sort_copy, in, in2, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::merge, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::set_difference, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::set_intersection, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::set_symmetric_difference, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::set_union, in, in2, out, &Foo::binary_pred, &Bar::val, &Bar::val);
+  test(std::ranges::remove, in, x, &Bar::val);
+  test(std::ranges::remove_if, in, &Foo::unary_pred, &Bar::val);
+  // `reverse` has neither a projection nor a predicate.
+  // `rotate` has neither a projection nor a predicate.
+  // `shuffle` has neither a projection nor a predicate.
+  //test(std::ranges::unique, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::partition, in, &Foo::unary_pred, &Bar::val);
+  if (!std::is_constant_evaluated())
+    test(std::ranges::stable_partition, in, &Foo::unary_pred, &Bar::val);
+  test(std::ranges::sort, in, &Foo::binary_pred, &Bar::val);
+  if (!std::is_constant_evaluated())
+    test(std::ranges::stable_sort, in, &Foo::binary_pred, &Bar::val);
+  test_mid(std::ranges::partial_sort, in, mid, &Foo::binary_pred, &Bar::val);
+  test_mid(std::ranges::nth_element, in, mid, &Foo::binary_pred, &Bar::val);
+  //test_mid(std::ranges::inplace_merge, in, mid, binary_pred);
+  test(std::ranges::make_heap, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::push_heap, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::pop_heap, in, &Foo::binary_pred, &Bar::val);
+  test(std::ranges::sort_heap, in, &Foo::binary_pred, &Bar::val);
+  //test(std::ranges::prev_permutation, in, &Foo::binary_pred, &Bar::val);
+  //test(std::ranges::next_permutation, in, &Foo::binary_pred, &Bar::val);
+
+  return true;
+}
+
+int main(int, char**) {
+  test_all();
+  static_assert(test_all());
+
+  return 0;
+}
diff --git a/libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp b/libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp
--- a/libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp
+++ b/libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp
@@ -27,18 +27,21 @@
 #include "MoveOnly.h"
 #include "test_iterators.h"
 
+// (in, ...)
 template <class Func, std::ranges::range Input, class ...Args>
 constexpr void test(Func&& func, Input& in, Args&& ...args) {
   func(in.begin(), in.end(), std::forward<Args>(args)...);
   func(in, std::forward<Args>(args)...);
 }
 
+// (in1, in2, ...)
 template <class Func, std::ranges::range Range1, std::ranges::range Range2, class ...Args>
 constexpr void test(Func&& func, Range1& r1, Range2& r2, Args&& ...args) {
   func(r1.begin(), r1.end(), r2.begin(), r2.end(), std::forward<Args>(args)...);
   func(r1, r2, std::forward<Args>(args)...);
 }
 
+// (in, mid, ...)
 template <class Func, std::ranges::range Input, class ...Args>
 constexpr void test_mid(Func&& func, Input& in, std::ranges::iterator_t<Input> mid, Args&& ...args) {
   func(in.begin(), mid, in.end(), std::forward<Args>(args)...);