diff --git a/libcxx/test/input.output/iostream.format/ext.manip/get_money.pass.cpp b/libcxx/test/input.output/iostream.format/ext.manip/get_money.pass.cpp
index cdd762a94a0f..1ea1d780c50f 100644
--- a/libcxx/test/input.output/iostream.format/ext.manip/get_money.pass.cpp
+++ b/libcxx/test/input.output/iostream.format/ext.manip/get_money.pass.cpp
@@ -11,6 +11,8 @@
 
 // template <class moneyT> T7 get_money(moneyT& mon, bool intl = false);
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <iomanip>
 #include <cassert>
 
diff --git a/libcxx/test/input.output/iostream.format/ext.manip/put_money.pass.cpp b/libcxx/test/input.output/iostream.format/ext.manip/put_money.pass.cpp
index 8d15dd93e0ba..a00cf139be93 100644
--- a/libcxx/test/input.output/iostream.format/ext.manip/put_money.pass.cpp
+++ b/libcxx/test/input.output/iostream.format/ext.manip/put_money.pass.cpp
@@ -11,6 +11,8 @@
 
 // template <class charT, class moneyT> T8 put_money(const moneyT& mon, bool intl = false);
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <iomanip>
 #include <cassert>
 
diff --git a/libcxx/test/localization/locale.categories/category.collate/locale.collate.byname/transform.pass.cpp b/libcxx/test/localization/locale.categories/category.collate/locale.collate.byname/transform.pass.cpp
index 20a7d48fe304..897141235cf2 100644
--- a/libcxx/test/localization/locale.categories/category.collate/locale.collate.byname/transform.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.collate/locale.collate.byname/transform.pass.cpp
@@ -13,6 +13,8 @@
 
 // string_type transform(const charT* low, const charT* high) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <string>
 #include <cassert>
diff --git a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/is_1.pass.cpp b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/is_1.pass.cpp
index 0ade80ae2bcd..509e52ab0e55 100644
--- a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/is_1.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/is_1.pass.cpp
@@ -13,6 +13,8 @@
 
 // bool is(mask m, charT c) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <type_traits>
 #include <cassert>
diff --git a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/is_many.pass.cpp b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/is_many.pass.cpp
index 39f60714143f..a993466ab5e7 100644
--- a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/is_many.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/is_many.pass.cpp
@@ -13,6 +13,8 @@
 
 // const charT* do_is(const charT* low, const charT* high, mask* vec) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <string>
 #include <vector>
diff --git a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/scan_is.pass.cpp b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/scan_is.pass.cpp
index ab087942046b..25b2c3e4ebd4 100644
--- a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/scan_is.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/scan_is.pass.cpp
@@ -13,6 +13,8 @@
 
 // const charT* scan_is(mask m, const charT* low, const charT* high) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <string>
 #include <vector>
diff --git a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/scan_not.pass.cpp b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/scan_not.pass.cpp
index 126fc5ab6817..270ae1f1595c 100644
--- a/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/scan_not.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.ctype/locale.ctype.byname/scan_not.pass.cpp
@@ -13,6 +13,8 @@
 
 // const charT* scan_not(mask m, const charT* low, const charT* high) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <string>
 #include <vector>
diff --git a/libcxx/test/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_en_US.pass.cpp b/libcxx/test/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_en_US.pass.cpp
index edd9015c8f5e..0f034fa4fdd3 100644
--- a/libcxx/test/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_en_US.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_en_US.pass.cpp
@@ -14,6 +14,8 @@
 // iter_type get(iter_type b, iter_type e, bool intl, ios_base& iob,
 //               ios_base::iostate& err, long double& v) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <ios>
 #include <streambuf>
diff --git a/libcxx/test/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_string_en_US.pass.cpp b/libcxx/test/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_string_en_US.pass.cpp
index 29c526648bc8..b9099f4f84e3 100644
--- a/libcxx/test/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_string_en_US.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_string_en_US.pass.cpp
@@ -14,6 +14,8 @@
 // iter_type get(iter_type b, iter_type e, bool intl, ios_base& iob,
 //               ios_base::iostate& err, string_type& v) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <ios>
 #include <streambuf>
diff --git a/libcxx/test/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_long_double_en_US.pass.cpp b/libcxx/test/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_long_double_en_US.pass.cpp
index 861480756c91..db193eabccd9 100644
--- a/libcxx/test/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_long_double_en_US.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_long_double_en_US.pass.cpp
@@ -14,6 +14,8 @@
 // iter_type put(iter_type s, bool intl, ios_base& f, char_type fill,
 //               long double units) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <ios>
 #include <streambuf>
diff --git a/libcxx/test/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_string_en_US.pass.cpp b/libcxx/test/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_string_en_US.pass.cpp
index 13c6ef75b787..659f948d61c8 100644
--- a/libcxx/test/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_string_en_US.pass.cpp
+++ b/libcxx/test/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_string_en_US.pass.cpp
@@ -14,6 +14,8 @@
 // iter_type put(iter_type s, bool intl, ios_base& f, char_type fill,
 //               const string_type& units) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 #include <locale>
 #include <ios>
 #include <streambuf>
diff --git a/libcxx/test/re/re.traits/translate_nocase.pass.cpp b/libcxx/test/re/re.traits/translate_nocase.pass.cpp
index 37d277450a75..0692e000d3f2 100644
--- a/libcxx/test/re/re.traits/translate_nocase.pass.cpp
+++ b/libcxx/test/re/re.traits/translate_nocase.pass.cpp
@@ -14,6 +14,8 @@
 
 // charT translate_nocase(charT c) const;
 
+// REQUIRES: locale.en_US.UTF-8
+
 // XFAIL: with_system_lib=x86_64-apple-darwin11
 // XFAIL: with_system_lib=x86_64-apple-darwin12