Index: libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char/lt.pass.cpp
===================================================================
--- libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char/lt.pass.cpp
+++ libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char/lt.pass.cpp
@@ -19,18 +19,20 @@
 
 int main(int, char**)
 {
-    assert( std::char_traits<char>::lt('\0', 'A'));
-    assert(!std::char_traits<char>::lt('A', '\0'));
+  assert(std::char_traits<char>::lt('\0', 'A'));
+  assert(!std::char_traits<char>::lt('A', '\0'));
 
-    assert(!std::char_traits<char>::lt('a', 'a'));
-    assert( std::char_traits<char>::lt('A', 'a'));
-    assert(!std::char_traits<char>::lt('a', 'A'));
+  assert(std::char_traits<char>::lt('A', 'a') == (static_cast<unsigned char>('A') < static_cast<unsigned char>('a')));
 
-    assert( std::char_traits<char>::lt('a', 'z'));
-    assert( std::char_traits<char>::lt('A', 'Z'));
+  assert(std::char_traits<char>::lt('0', '9'));
+  assert(std::char_traits<char>::lt('a', 'z'));
+  assert(std::char_traits<char>::lt('A', 'Z'));
 
-    assert( std::char_traits<char>::lt(' ', 'A'));
-    assert( std::char_traits<char>::lt('A', '~'));
+  assert(!std::char_traits<char>::lt('a', 'a'));
+  assert(!std::char_traits<char>::lt('A', 'A'));
+  assert(!std::char_traits<char>::lt('5', '5'));
 
+  assert(std::char_traits<char>::lt('C', 'G'));
+  assert(std::char_traits<char>::lt('c', 'g'));
   return 0;
 }
Index: libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/lt.pass.cpp
===================================================================
--- libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/lt.pass.cpp
+++ libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.wchar.t/lt.pass.cpp
@@ -19,8 +19,13 @@
 
 int main(int, char**)
 {
-    assert(!std::char_traits<wchar_t>::lt(L'a', L'a'));
-    assert( std::char_traits<wchar_t>::lt(L'A', L'a'));
+  assert(std::char_traits<wchar_t>::lt(L'A', L'a') == (static_cast<unsigned char>(L'A') < static_cast<unsigned char>(L'a')));
+  assert(!std::char_traits<wchar_t>::lt(L'a', L'a'));
+  assert(!std::char_traits<wchar_t>::lt(L'A', L'A'));
+  assert(!std::char_traits<wchar_t>::lt(L'1', L'1'));
+  assert(std::char_traits<wchar_t>::lt(L'A', L'C'));
+  assert(std::char_traits<wchar_t>::lt(L'a', L'c'));
+  assert(std::char_traits<wchar_t>::lt(L'1', L'3'));
 
   return 0;
 }