diff --git a/test/std/re/re.alg/re.alg.match/awk.pass.cpp b/test/std/re/re.alg/re.alg.match/awk.pass.cpp
index d2065a03..e4b2f3ec 100644
--- a/test/std/re/re.alg/re.alg.match/awk.pass.cpp
+++ b/test/std/re/re.alg/re.alg.match/awk.pass.cpp
@@ -19,9 +19,10 @@
 
 #include <regex>
 #include <cassert>
-
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
 /*    {
@@ -613,7 +614,7 @@ int main()
                                                  std::regex_constants::awk)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
 */    {
         std::cmatch m;
         const char s[] = "m";
@@ -1294,7 +1295,7 @@ int main()
                                                  std::regex_constants::awk)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::wcmatch m;
         const wchar_t s[] = L"m";
diff --git a/test/std/re/re.alg/re.alg.match/basic.pass.cpp b/test/std/re/re.alg/re.alg.match/basic.pass.cpp
index 4139cea3..2ddc07a2 100644
--- a/test/std/re/re.alg/re.alg.match/basic.pass.cpp
+++ b/test/std/re/re.alg/re.alg.match/basic.pass.cpp
@@ -23,9 +23,10 @@
 
 #include <regex>
 #include <cassert>
-
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -619,7 +620,7 @@ int main()
                                                  std::regex_constants::basic)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::cmatch m;
         const char s[] = "m";
@@ -1287,7 +1288,7 @@ int main()
                                                  std::regex_constants::basic)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::wcmatch m;
         const wchar_t s[] = L"m";
diff --git a/test/std/re/re.alg/re.alg.match/ecma.pass.cpp b/test/std/re/re.alg/re.alg.match/ecma.pass.cpp
index 38540560..785a61c4 100644
--- a/test/std/re/re.alg/re.alg.match/ecma.pass.cpp
+++ b/test/std/re/re.alg/re.alg.match/ecma.pass.cpp
@@ -23,9 +23,10 @@
 
 #include <regex>
 #include <cassert>
-
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -581,7 +582,7 @@ int main()
         assert(!std::regex_match(s, m, std::regex("[a[.hyphen.]z]")));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::cmatch m;
         const char s[] = "m";
@@ -1246,7 +1247,7 @@ int main()
         assert(!std::regex_match(s, m, std::wregex(L"[a[.hyphen.]z]")));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::wcmatch m;
         const wchar_t s[] = L"m";
diff --git a/test/std/re/re.alg/re.alg.match/extended.pass.cpp b/test/std/re/re.alg/re.alg.match/extended.pass.cpp
index c54825de..9ca31d18 100644
--- a/test/std/re/re.alg/re.alg.match/extended.pass.cpp
+++ b/test/std/re/re.alg/re.alg.match/extended.pass.cpp
@@ -23,9 +23,10 @@
 
 #include <regex>
 #include <cassert>
-
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -617,7 +618,7 @@ int main()
                                                  std::regex_constants::extended)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::cmatch m;
         const char s[] = "m";
@@ -1283,7 +1284,7 @@ int main()
                                                  std::regex_constants::extended)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::wcmatch m;
         const wchar_t s[] = L"m";
diff --git a/test/std/re/re.alg/re.alg.search/awk.pass.cpp b/test/std/re/re.alg/re.alg.search/awk.pass.cpp
index 521e98b3..7fc1b3fc 100644
--- a/test/std/re/re.alg/re.alg.search/awk.pass.cpp
+++ b/test/std/re/re.alg/re.alg.search/awk.pass.cpp
@@ -23,9 +23,10 @@
 
 #include <regex>
 #include <cassert>
-
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -689,7 +690,7 @@ int main()
                                                  std::regex_constants::awk)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::cmatch m;
         const char s[] = "m";
@@ -1460,7 +1461,7 @@ int main()
                                                  std::regex_constants::awk)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::wcmatch m;
         const wchar_t s[] = L"m";
diff --git a/test/std/re/re.alg/re.alg.search/basic.pass.cpp b/test/std/re/re.alg/re.alg.search/basic.pass.cpp
index 838294e9..bdfcd9cc 100644
--- a/test/std/re/re.alg/re.alg.search/basic.pass.cpp
+++ b/test/std/re/re.alg/re.alg.search/basic.pass.cpp
@@ -23,9 +23,10 @@
 
 #include <regex>
 #include <cassert>
-
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -691,7 +692,7 @@ int main()
                                                  std::regex_constants::basic)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::cmatch m;
         const char s[] = "m";
@@ -1449,7 +1450,7 @@ int main()
                                                  std::regex_constants::basic)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::wcmatch m;
         const wchar_t s[] = L"m";
diff --git a/test/std/re/re.alg/re.alg.search/ecma.pass.cpp b/test/std/re/re.alg/re.alg.search/ecma.pass.cpp
index 2796850f..fb9fc26a 100644
--- a/test/std/re/re.alg/re.alg.search/ecma.pass.cpp
+++ b/test/std/re/re.alg/re.alg.search/ecma.pass.cpp
@@ -23,9 +23,10 @@
 
 #include <regex>
 #include <cassert>
-
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -671,7 +672,7 @@ int main()
         assert(!std::regex_search(s, m, std::regex("[a[.hyphen.]z]")));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::cmatch m;
         const char s[] = "m";
@@ -1450,7 +1451,7 @@ int main()
         assert(!std::regex_search(s, m, std::wregex(L"[a[.hyphen.]z]")));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::wcmatch m;
         const wchar_t s[] = L"m";
diff --git a/test/std/re/re.alg/re.alg.search/extended.pass.cpp b/test/std/re/re.alg/re.alg.search/extended.pass.cpp
index a8a121bd..81eef2f9 100644
--- a/test/std/re/re.alg/re.alg.search/extended.pass.cpp
+++ b/test/std/re/re.alg/re.alg.search/extended.pass.cpp
@@ -23,9 +23,10 @@
 
 #include <regex>
 #include <cassert>
-
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -689,7 +690,7 @@ int main()
                                                  std::regex_constants::extended)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::cmatch m;
         const char s[] = "m";
@@ -1445,7 +1446,7 @@ int main()
                                                  std::regex_constants::extended)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     {
         std::wcmatch m;
         const wchar_t s[] = L"m";
diff --git a/test/std/re/re.traits/lookup_collatename.pass.cpp b/test/std/re/re.traits/lookup_collatename.pass.cpp
index d495f8aa..a7cd5f07 100644
--- a/test/std/re/re.traits/lookup_collatename.pass.cpp
+++ b/test/std/re/re.traits/lookup_collatename.pass.cpp
@@ -25,6 +25,8 @@
 #include <cassert>
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 template <class char_type>
 void
 test(const char_type* A, const std::basic_string<char_type>& expected)
@@ -108,7 +110,7 @@ int main()
 
     test("tild", std::string(""));
     test("ch", std::string(""));
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     test("ch", std::string("ch"));
     std::locale::global(std::locale("C"));
 
@@ -184,7 +186,7 @@ int main()
 
     test(L"tild", std::wstring(L""));
     test(L"ch", std::wstring(L""));
-    std::locale::global(std::locale("cs_CZ.ISO8859-2"));
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
     test(L"ch", std::wstring(L"ch"));
     std::locale::global(std::locale("C"));
 }
diff --git a/test/std/re/re.traits/transform.pass.cpp b/test/std/re/re.traits/transform.pass.cpp
index c3bce793..85235e04 100644
--- a/test/std/re/re.traits/transform.pass.cpp
+++ b/test/std/re/re.traits/transform.pass.cpp
@@ -21,6 +21,8 @@
 #include <cassert>
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -29,7 +31,7 @@ int main()
         const char B[] = "B";
         typedef forward_iterator<const char*> F;
         assert(t.transform(F(a), F(a+1)) > t.transform(F(B), F(B+1)));
-        t.imbue(std::locale("cs_CZ.ISO8859-2"));
+        t.imbue(std::locale(LOCALE_cs_CZ_ISO8859_2));
         assert(t.transform(F(a), F(a+1)) < t.transform(F(B), F(B+1)));
     }
     {
@@ -38,7 +40,7 @@ int main()
         const wchar_t B[] = L"B";
         typedef forward_iterator<const wchar_t*> F;
         assert(t.transform(F(a), F(a+1)) > t.transform(F(B), F(B+1)));
-        t.imbue(std::locale("cs_CZ.ISO8859-2"));
+        t.imbue(std::locale(LOCALE_cs_CZ_ISO8859_2));
         assert(t.transform(F(a), F(a+1)) < t.transform(F(B), F(B+1)));
     }
 }
diff --git a/test/std/re/re.traits/transform_primary.pass.cpp b/test/std/re/re.traits/transform_primary.pass.cpp
index 28734d62..438cd754 100644
--- a/test/std/re/re.traits/transform_primary.pass.cpp
+++ b/test/std/re/re.traits/transform_primary.pass.cpp
@@ -22,6 +22,8 @@
 #include <cassert>
 #include "test_iterators.h"
 
+#include "platform_support.h" // locale name macros
+
 int main()
 {
     {
@@ -31,7 +33,7 @@ int main()
         typedef forward_iterator<const char*> F;
         assert(t.transform_primary(F(A), F(A+1)) !=
                t.transform_primary(F(Aacute), F(Aacute+1)));
-        t.imbue(std::locale("cs_CZ.ISO8859-2"));
+        t.imbue(std::locale(LOCALE_cs_CZ_ISO8859_2));
         assert(t.transform_primary(F(A), F(A+1)) ==
                t.transform_primary(F(Aacute), F(Aacute+1)));
     }
@@ -42,7 +44,7 @@ int main()
         typedef forward_iterator<const wchar_t*> F;
         assert(t.transform_primary(F(A), F(A+1)) !=
                t.transform_primary(F(Aacute), F(Aacute+1)));
-        t.imbue(std::locale("cs_CZ.ISO8859-2"));
+        t.imbue(std::locale(LOCALE_cs_CZ_ISO8859_2));
         assert(t.transform_primary(F(A), F(A+1)) ==
                t.transform_primary(F(Aacute), F(Aacute+1)));
     }