diff --git a/test/iso_week/weeknum_weekday.pass.cpp b/test/iso_week/weeknum_weekday.pass.cpp
new file mode 100644
index 0000000..ebfe682
--- /dev/null
+++ b/test/iso_week/weeknum_weekday.pass.cpp
@@ -0,0 +1,86 @@
+// The MIT License (MIT)
+// 
+// Copyright (c) 2015 Howard Hinnant
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+// class weeknum_weekday
+// {
+//     iso_week::weeknum wn_;  // exposition only
+//     iso_week::weekday wd_;  // exposition only
+// 
+// public:
+//     constexpr weeknum_weekday(const iso_week::weeknum& wn,
+//                               const iso_week::weekday& wd) noexcept;
+// 
+//     constexpr iso_week::weeknum weeknum() const noexcept;
+//     constexpr iso_week::weekday weekday() const noexcept;
+// 
+//     constexpr bool ok() const noexcept;
+// };
+// 
+// constexpr bool operator==(const weeknum_weekday& x, const weeknum_weekday& y) noexcept;
+// constexpr bool operator!=(const weeknum_weekday& x, const weeknum_weekday& y) noexcept;
+// constexpr bool operator< (const weeknum_weekday& x, const weeknum_weekday& y) noexcept;
+// constexpr bool operator> (const weeknum_weekday& x, const weeknum_weekday& y) noexcept;
+// constexpr bool operator<=(const weeknum_weekday& x, const weeknum_weekday& y) noexcept;
+// constexpr bool operator>=(const weeknum_weekday& x, const weeknum_weekday& y) noexcept;
+// 
+// std::ostream& operator<<(std::ostream& os, const weeknum_weekday& md);
+
+#include "iso_week.h"
+
+#include <cassert>
+#include <sstream>
+#include <type_traits>
+
+static_assert( std::is_trivially_destructible<iso_week::weeknum_weekday>{}, "");
+static_assert(!std::is_default_constructible<iso_week::weeknum_weekday>{}, "");
+static_assert( std::is_trivially_copy_constructible<iso_week::weeknum_weekday>{}, "");
+static_assert( std::is_trivially_copy_assignable<iso_week::weeknum_weekday>{}, "");
+static_assert( std::is_trivially_move_constructible<iso_week::weeknum_weekday>{}, "");
+static_assert( std::is_trivially_move_assignable<iso_week::weeknum_weekday>{}, "");
+
+static_assert(std::is_trivially_copyable<iso_week::weeknum_weekday>{}, "");
+static_assert(std::is_standard_layout<iso_week::weeknum_weekday>{}, "");
+static_assert(std::is_literal_type<iso_week::weeknum_weekday>{}, "");
+
+static_assert( std::is_nothrow_constructible<iso_week::weeknum_weekday,
+                                                 iso_week::weeknum,
+                                                 iso_week::weekday>{}, "");
+
+int
+main()
+{
+    using namespace iso_week;
+
+    constexpr auto wn_wd = weeknum_weekday{52_w, tue};
+    static_assert(wn_wd.weeknum() == 52_w, "");
+    static_assert(wn_wd.weekday() == tue, "");
+
+    static_assert(wn_wd.ok(), "");
+
+    static_assert(wn_wd == weeknum_weekday{52_w, tue}, "");
+    static_assert(!(wn_wd != weeknum_weekday{52_w, tue}), "");
+    static_assert(wn_wd < weeknum_weekday{52_w, wed}, "");
+
+    std::ostringstream os;
+    os << wn_wd;
+    assert(os.str() == "W52-Tue");
+}