diff --git a/test/sources/libcxx/MultiSetTests.h b/test/sources/libcxx/MultiSetTests.h
index 00b58799..1aae0251 100644
--- a/test/sources/libcxx/MultiSetTests.h
+++ b/test/sources/libcxx/MultiSetTests.h
@@ -108,6 +108,12 @@ LIBCXX_TEST_BEGIN(insert_node_type_hint)
 #include "multiset/insert_node_type_hint.pass.cpp"
 LIBCXX_TEST_END
 
+#if TEST_STD_VER >= 23
+LIBCXX_TEST_BEGIN(insert_range)
+#include "multiset/insert_range.pass.cpp"
+LIBCXX_TEST_END
+#endif
+
 LIBCXX_TEST_BEGIN(insert_rv)
 #include "multiset/insert_rv.pass.cpp"
 LIBCXX_TEST_END
@@ -208,6 +214,12 @@ LIBCXX_TEST_BEGIN(cons_dtor_noexcept)
 #include "multiset/multiset.cons/dtor_noexcept.pass.cpp"
 LIBCXX_TEST_END
 
+#if TEST_STD_VER >= 23
+LIBCXX_TEST_BEGIN(cons_from_range)
+#include "multiset/multiset.cons/from_range.pass.cpp"
+LIBCXX_TEST_END
+#endif
+
 LIBCXX_TEST_BEGIN(cons_initializer_list)
 #include "multiset/multiset.cons/initializer_list.pass.cpp"
 LIBCXX_TEST_END
diff --git a/test/sources/libcxx/multiset/insert_range.pass.cpp b/test/sources/libcxx/multiset/insert_range.pass.cpp
new file mode 100644
index 00000000..ed88bcd6
--- /dev/null
+++ b/test/sources/libcxx/multiset/insert_range.pass.cpp
@@ -0,0 +1,35 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Modified for https://github.com/morzhovets/momo project.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
+// ADDITIONAL_COMPILE_FLAGS(gcc-style-warnings): -Wno-missing-field-initializers
+
+// <set>
+
+// template<container-compatible-range<value_type> R>
+//   void insert_range(R&& rg); // C++23
+
+int main(int, char**) {
+  for_all_iterators_and_allocators<int, const int*>([]<class Iter, class Sent, class Alloc>() {
+    test_map_set_insert_range<std::multiset<int, test_less<int>, Alloc>, int, Iter, Sent>(/*allow_duplicates=*/true);
+  });
+
+  static_assert(test_set_constraints_insert_range<std::multiset, int, double>());
+
+  test_set_insert_range_move_only<std::multiset>();
+
+  test_set_insert_range_exception_safety_throwing_copy<std::multiset>();
+  test_assoc_set_insert_range_exception_safety_throwing_allocator<std::multiset, int>();
+
+  return 0;
+}
diff --git a/test/sources/libcxx/multiset/multiset.cons/deduct.pass.cpp b/test/sources/libcxx/multiset/multiset.cons/deduct.pass.cpp
index 16003563..d962ad36 100644
--- a/test/sources/libcxx/multiset/multiset.cons/deduct.pass.cpp
+++ b/test/sources/libcxx/multiset/multiset.cons/deduct.pass.cpp
@@ -31,6 +31,15 @@
 // template<class Key, class Allocator>
 // multiset(initializer_list<Key>, Allocator)
 //   -> multiset<Key, less<Key>, Allocator>;
+//
+// template<ranges::input_range R, class Compare = less<ranges::range_value_t<R>>,
+//          class Allocator = allocator<ranges::range_value_t<R>>>
+//   multiset(from_range_t, R&&, Compare = Compare(), Allocator = Allocator())
+//     -> multiset<ranges::range_value_t<R>, Compare, Allocator>;
+//
+// template<ranges::input_range R, class Allocator>
+//   multiset(from_range_t, R&&, Allocator)
+//     -> multiset<ranges::range_value_t<R>, less<ranges::range_value_t<R>>, Allocator>;
 
 struct NotAnAllocator {
   friend bool operator<(NotAnAllocator, NotAnAllocator) { return false; }
@@ -189,6 +198,35 @@ int main(int, char **) {
   }
 #endif
 
+#if TEST_STD_VER >= 23
+    {
+      using Range = std::array<int, 0>;
+      using Comp = std::greater<int>;
+      using DefaultComp = std::less<int>;
+      using Alloc = test_allocator<int>;
+
+      { // (from_range, range)
+        momo::stdish::multiset c(std::from_range, Range());
+        static_assert(std::is_same_v<decltype(c), momo::stdish::multiset<int>>);
+      }
+
+      { // (from_range, range, comp)
+        momo::stdish::multiset c(std::from_range, Range(), Comp());
+        static_assert(std::is_same_v<decltype(c), momo::stdish::multiset<int, Comp>>);
+      }
+
+      { // (from_range, range, comp, alloc)
+        momo::stdish::multiset c(std::from_range, Range(), Comp(), Alloc());
+        static_assert(std::is_same_v<decltype(c), momo::stdish::multiset<int, Comp, Alloc>>);
+      }
+
+      { // (from_range, range, alloc)
+        momo::stdish::multiset c(std::from_range, Range(), Alloc());
+        static_assert(std::is_same_v<decltype(c), momo::stdish::multiset<int, DefaultComp, Alloc>>);
+      }
+    }
+#endif
+
 //#if MOMO_VERSION_MAJOR > 3
 #if !(defined(TEST_MSVC) && _MSC_VER < 1930) && !(defined(TEST_GCC) && __GNUC__ < 11)
   AssociativeContainerDeductionGuidesSfinaeAway<std::multiset, std::multiset<int>>();
diff --git a/test/sources/libcxx/multiset/multiset.cons/from_range.pass.cpp b/test/sources/libcxx/multiset/multiset.cons/from_range.pass.cpp
new file mode 100644
index 00000000..f96fe35c
--- /dev/null
+++ b/test/sources/libcxx/multiset/multiset.cons/from_range.pass.cpp
@@ -0,0 +1,41 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Modified for https://github.com/morzhovets/momo project.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+
+// template<container-compatible-range<value_type> R>
+//   multiset(from_range_t, R&& rg, const Compare& comp = Compare(), const Allocator& = Allocator()); // C++23
+//
+// template<container-compatible-range<value_type> R>
+//   multiset(from_range_t, R&& rg, const Allocator& a))
+//     : multiset(from_range, std::forward<R>(rg), Compare(), a) { } // C++23
+
+void test_duplicates() {
+  std::array input = {1, 2, 3, 3, 3, 4, 2, 1, 2};
+  auto c = std::multiset<int>(std::from_range, input);
+  assert(std::ranges::is_permutation(input, c));
+}
+
+int main(int, char**) {
+  for_all_iterators_and_allocators<int>([]<class Iter, class Sent, class Alloc>() {
+    test_associative_set<std::multiset, int, Iter, Sent, test_less<int>, Alloc>();
+  });
+  test_associative_set_move_only<std::multiset>();
+  test_duplicates();
+
+  static_assert(test_set_constraints<std::multiset, int, double>());
+
+  test_set_exception_safety_throwing_copy<std::multiset>();
+  test_set_exception_safety_throwing_allocator<std::multiset, int>();
+
+  return 0;
+}