Index: libcxx/test/std/containers/associative/multiset/multiset.nonmember/op_compare.pass.cpp
===================================================================
--- /dev/null
+++ libcxx/test/std/containers/associative/multiset/multiset.nonmember/op_compare.pass.cpp
@@ -0,0 +1,74 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <set>
+
+// template<class Key, class Compare, class Alloc>
+// bool operator==(const std::multiset<Key, Compare, Alloc>& lhs,
+//                 const std::multiset<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator!=(const std::multiset<Key, Compare, Alloc>& lhs,
+//                 const std::multiset<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator<(const std::multiset<Key, Compare, Alloc>& lhs,
+//                const std::multiset<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator>(const std::multiset<Key, Compare, Alloc>& lhs,
+//                const std::multiset<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator<=(const std::multiset<Key, Compare, Alloc>& lhs,
+//                 const std::multiset<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator>=(const std::multiset<Key, Compare, Alloc>& lhs,
+//                 const std::multiset<Key, Compare, Alloc>& rhs);
+
+#include <set>
+#include <cassert>
+#include <string>
+
+#include "test_comparisons.h"
+
+int main(int, char**) {
+    {
+        std::multiset<int> s1, s2;
+        s1.insert(1);
+        s2.insert(2);
+        const std::multiset<int>& cs1 = s1, cs2 = s2;
+        assert(testComparisons6(cs1, cs2, false, true));
+    }
+    {
+        std::multiset<int> s1, s2;
+        s1.insert(1);
+        s2.insert(1);
+        const std::multiset<int>& cs1 = s1, cs2 = s2;
+        assert(testComparisons6(cs1, cs2, true, false));
+    }
+    {
+        std::multiset<int> s1, s2;
+        s1.insert(1);
+        s2.insert(1);
+        s2.insert(2);
+        const std::multiset<int>& cs1 = s1, cs2 = s2;
+        assert(testComparisons6(cs1, cs2, false, true));
+    }
+    {
+        std::multiset<int> s1, s2;
+        s1.insert(1);
+        s2.insert(1);
+        s2.insert(1);
+        s2.insert(1);
+        const std::multiset<int>& cs1 = s1, cs2 = s2;
+        assert(testComparisons6(cs1, cs2, false, true));
+    }
+    return 0;
+}
Index: libcxx/test/std/containers/associative/set/set.nonmember/op_compare.pass.cpp
===================================================================
--- /dev/null
+++ libcxx/test/std/containers/associative/set/set.nonmember/op_compare.pass.cpp
@@ -0,0 +1,65 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <set>
+
+// template<class Key, class Compare, class Alloc>
+// bool operator==(const std::set<Key, Compare, Alloc>& lhs,
+//                 const std::set<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator!=(const std::set<Key, Compare, Alloc>& lhs,
+//                 const std::set<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator<(const std::set<Key, Compare, Alloc>& lhs,
+//                const std::set<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator>(const std::set<Key, Compare, Alloc>& lhs,
+//                const std::set<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator<=(const std::set<Key, Compare, Alloc>& lhs,
+//                 const std::set<Key, Compare, Alloc>& rhs);
+//
+// template<class Key, class Compare, class Alloc>
+// bool operator>=(const std::set<Key, Compare, Alloc>& lhs,
+//                 const std::set<Key, Compare, Alloc>& rhs);
+
+#include <set>
+#include <cassert>
+#include <string>
+
+#include "test_comparisons.h"
+
+int main(int, char**) {
+    {
+        std::set<int> s1, s2;
+        s1.insert(1);
+        s2.insert(2);
+        const std::set<int>& cs1 = s1, cs2 = s2;
+        assert(testComparisons6(cs1, cs2, false, true));
+    }
+    {
+        std::set<int> s1, s2;
+        s1.insert(1);
+        s2.insert(1);
+        const std::set<int>& cs1 = s1, cs2 = s2;
+        assert(testComparisons6(cs1, cs2, true, false));
+    }
+    {
+        std::set<int> s1, s2;
+        s1.insert(1);
+        s2.insert(1);
+        s2.insert(2);
+        const std::set<int>& cs1 = s1, cs2 = s2;
+        assert(testComparisons6(cs1, cs2, false, true));
+    }
+    return 0;
+}