diff --git a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/tolower_1.pass.cpp b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/tolower_1.pass.cpp
index 9714979f9e45..8f84195f69fc 100644
--- a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/tolower_1.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/tolower_1.pass.cpp
@@ -13,6 +13,9 @@
 
 // charT tolower(charT) const;
 
+// XFAIL: with_system_lib=x86_64-apple-darwin11
+// XFAIL: with_system_lib=x86_64-apple-darwin12
+
 #include <locale>
 #include <cassert>
 
diff --git a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/tolower_many.pass.cpp b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/tolower_many.pass.cpp
index aa2736df26a6..1f480760ce7f 100644
--- a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/tolower_many.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/tolower_many.pass.cpp
@@ -13,6 +13,9 @@
 
 // const charT* tolower(charT* low, const charT* high) const;
 
+// XFAIL: with_system_lib=x86_64-apple-darwin11
+// XFAIL: with_system_lib=x86_64-apple-darwin12
+
 #include <locale>
 #include <string>
 #include <cassert>
diff --git a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/toupper_1.pass.cpp b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/toupper_1.pass.cpp
index e7503ae9a1c9..d2157911f6f3 100644
--- a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/toupper_1.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/toupper_1.pass.cpp
@@ -13,6 +13,9 @@
 
 // charT toupper(charT) const;
 
+// XFAIL: with_system_lib=x86_64-apple-darwin11
+// XFAIL: with_system_lib=x86_64-apple-darwin12
+
 #include <locale>
 #include <cassert>
 
diff --git a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/toupper_many.pass.cpp b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/toupper_many.pass.cpp
index 1aedec68b127..c3c32e71f5de 100644
--- a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/toupper_many.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/toupper_many.pass.cpp
@@ -13,6 +13,9 @@
 
 // const charT* toupper(charT* low, const charT* high) const;
 
+// XFAIL: with_system_lib=x86_64-apple-darwin11
+// XFAIL: with_system_lib=x86_64-apple-darwin12
+
 #include <locale>
 #include <string>
 #include <cassert>
diff --git a/libcxx/test/re/re.traits/translate_nocase.pass.cpp b/libcxx/test/re/re.traits/translate_nocase.pass.cpp
index 06e987de035e..5e042aead86c 100644
--- a/libcxx/test/re/re.traits/translate_nocase.pass.cpp
+++ b/libcxx/test/re/re.traits/translate_nocase.pass.cpp
@@ -14,6 +14,9 @@
 
 // charT translate_nocase(charT c) const;
 
+// XFAIL: with_system_lib=x86_64-apple-darwin11
+// XFAIL: with_system_lib=x86_64-apple-darwin12
+
 #include <regex>
 #include <cassert>