1 files changed, 18 insertions, 0 deletions
diff --git a/libcxx/test/std/strings/basic.string/traits_mismatch.fail.cpp b/libcxx/test/std/strings/basic.string/traits_mismatch.fail.cpp
new file mode 100644
index 00000000000..1d54238ae0c
--- /dev/null
+++ b/libcxx/test/std/strings/basic.string/traits_mismatch.fail.cpp
@@ -0,0 +1,18 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+//   The strings's value type must be the same as the traits's char_type
+
+#include <string>
+
+int main()
+{
+    std::basic_string<char, std::char_traits<wchar_t>> s;
+}