1 files changed, 29 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/time/months.pass.cpp b/libcxx/test/std/utilities/time/months.pass.cpp
new file mode 100644
index 00000000000..9a48b0a19d7
--- /dev/null
+++ b/libcxx/test/std/utilities/time/months.pass.cpp
@@ -0,0 +1,29 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// UNSUPPORTED: c++03, c++11, c++14, c++17
+
+// <chrono>
+
+// using months = duration<signed integer type of at least 20 bits, ratio_divide<years::period, ratio<12>>>;
+
+
+#include <chrono>
+#include <type_traits>
+#include <limits>
+
+int main()
+{
+    typedef std::chrono::months D;
+    typedef D::rep Rep;
+    typedef D::period Period;
+    static_assert(std::is_signed<Rep>::value, "");
+    static_assert(std::is_integral<Rep>::value, "");
+    static_assert(std::numeric_limits<Rep>::digits >= 20, "");
+    static_assert(std::is_same_v<Period, std::ratio_divide<std::chrono::years::period, std::ratio<12>>>, "");
+}