diff --git a/libcxx/test/std/re/re.alg/re.alg.match/awk.locale.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.match/awk.locale.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/re/re.alg/re.alg.match/awk.locale.pass.cpp
@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// <regex>
+
+// template <class BidirectionalIterator, class Allocator, class charT,
+//           class traits>
+//   bool regex_match(BidirectionalIterator first, BidirectionalIterator last,
+//                    match_results<BidirectionalIterator, Allocator>& m,
+//                    const basic_regex<charT, traits>& e,
+//                    regex_constants::match_flag_type flags
+//                                            = regex_constants::match_default);
+
+// TODO: investigation needed
+// TODO(netbsd): incomplete support for locales
+// XFAIL: linux-gnu, netbsd, freebsd
+// REQUIRES: locale.cs_CZ.ISO8859-2
+
+#include <regex>
+#include <cassert>
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#include "platform_support.h" // locale name macros
+
+int main(int, char**)
+{
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(std::regex_match(s, m,
+                      std::regex("[a[=M=]z]", std::regex_constants::awk)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert((size_t)m.length(0) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::cmatch m;
+        const char s[] = "Ch";
+        assert(std::regex_match(s, m, std::regex("[a[.ch.]z]",
+                   std::regex_constants::awk | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert((size_t)m.length(0) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(!std::regex_match(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::awk)));
+        assert(m.size() == 0);
+    }
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::awk)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert((size_t)m.length(0) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"Ch";
+        assert(std::regex_match(s, m, std::wregex(L"[a[.ch.]z]",
+                   std::regex_constants::awk | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert((size_t)m.length(0) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(!std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::awk)));
+        assert(m.size() == 0);
+    }
+    return 0;
+}
diff --git a/libcxx/test/std/re/re.alg/re.alg.match/awk.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.match/awk.pass.cpp
--- a/libcxx/test/std/re/re.alg/re.alg.match/awk.pass.cpp
+++ b/libcxx/test/std/re/re.alg/re.alg.match/awk.pass.cpp
@@ -16,18 +16,11 @@
 //                    regex_constants::match_flag_type flags
 //                                            = regex_constants::match_default);
 
-// TODO: investigation needed
-// TODO(netbsd): incomplete support for locales
-// XFAIL: linux-gnu, netbsd
-// REQUIRES: locale.cs_CZ.ISO8859-2
-
 #include <regex>
 #include <cassert>
 #include "test_macros.h"
 #include "test_iterators.h"
 
-#include "platform_support.h" // locale name macros
-
 int main(int, char**)
 {
     {
@@ -619,47 +612,6 @@
                                                  std::regex_constants::awk)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(std::regex_match(s, m,
-                      std::regex("[a[=M=]z]", std::regex_constants::awk)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert((size_t)m.length(0) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::cmatch m;
-        const char s[] = "Ch";
-        assert(std::regex_match(s, m, std::regex("[a[.ch.]z]",
-                   std::regex_constants::awk | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert((size_t)m.length(0) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(!std::regex_match(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::awk)));
-        assert(m.size() == 0);
-    }
     {
         std::cmatch m;
         const char s[] = "01a45cef9";
@@ -1300,47 +1252,6 @@
                                                  std::regex_constants::awk)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::awk)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert((size_t)m.length(0) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"Ch";
-        assert(std::regex_match(s, m, std::wregex(L"[a[.ch.]z]",
-                   std::regex_constants::awk | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert((size_t)m.length(0) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(!std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::awk)));
-        assert(m.size() == 0);
-    }
     {
         std::wcmatch m;
         const wchar_t s[] = L"01a45cef9";
diff --git a/libcxx/test/std/re/re.alg/re.alg.match/basic.locale.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.match/basic.locale.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/re/re.alg/re.alg.match/basic.locale.pass.cpp
@@ -0,0 +1,118 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// NetBSD does not support LC_COLLATE at the moment
+// XFAIL: netbsd
+
+// REQUIRES: locale.cs_CZ.ISO8859-2
+
+// <regex>
+
+// template <class BidirectionalIterator, class Allocator, class charT, class traits>
+//     bool
+//     regex_match(BidirectionalIterator first, BidirectionalIterator last,
+//                  match_results<BidirectionalIterator, Allocator>& m,
+//                  const basic_regex<charT, traits>& e,
+//                  regex_constants::match_flag_type flags = regex_constants::match_default);
+
+// TODO: investigation needed
+// XFAIL: linux-gnu, freebsd
+
+#include <regex>
+#include <cassert>
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#include "platform_support.h" // locale name macros
+
+int main(int, char**)
+{
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(std::regex_match(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::basic)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::cmatch m;
+        const char s[] = "Ch";
+        assert(std::regex_match(s, m, std::regex("[a[.ch.]z]",
+                   std::regex_constants::basic | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(!std::regex_match(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::basic)));
+        assert(m.size() == 0);
+    }
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::basic)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"Ch";
+        assert(std::regex_match(s, m, std::wregex(L"[a[.ch.]z]",
+                   std::regex_constants::basic | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(!std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::basic)));
+        assert(m.size() == 0);
+    }
+    return 0;
+}
diff --git a/libcxx/test/std/re/re.alg/re.alg.match/basic.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.match/basic.pass.cpp
--- a/libcxx/test/std/re/re.alg/re.alg.match/basic.pass.cpp
+++ b/libcxx/test/std/re/re.alg/re.alg.match/basic.pass.cpp
@@ -6,10 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// NetBSD does not support LC_COLLATE at the moment
-// XFAIL: netbsd
-
-// REQUIRES: locale.cs_CZ.ISO8859-2
 
 // <regex>
 
@@ -20,16 +16,11 @@
 //                  const basic_regex<charT, traits>& e,
 //                  regex_constants::match_flag_type flags = regex_constants::match_default);
 
-// TODO: investigation needed
-// XFAIL: linux-gnu
-
 #include <regex>
 #include <cassert>
 #include "test_macros.h"
 #include "test_iterators.h"
 
-#include "platform_support.h" // locale name macros
-
 int main(int, char**)
 {
     {
@@ -623,47 +614,6 @@
                                                  std::regex_constants::basic)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(std::regex_match(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::basic)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::cmatch m;
-        const char s[] = "Ch";
-        assert(std::regex_match(s, m, std::regex("[a[.ch.]z]",
-                   std::regex_constants::basic | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(!std::regex_match(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::basic)));
-        assert(m.size() == 0);
-    }
     {
         std::cmatch m;
         const char s[] = "01a45cef9";
@@ -1291,47 +1241,6 @@
                                                  std::regex_constants::basic)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::basic)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"Ch";
-        assert(std::regex_match(s, m, std::wregex(L"[a[.ch.]z]",
-                   std::regex_constants::basic | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(!std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::basic)));
-        assert(m.size() == 0);
-    }
     {
         std::wcmatch m;
         const wchar_t s[] = L"01a45cef9";
diff --git a/libcxx/test/std/re/re.alg/re.alg.match/ecma.locale.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.match/ecma.locale.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/re/re.alg/re.alg.match/ecma.locale.pass.cpp
@@ -0,0 +1,75 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// NetBSD does not support LC_COLLATE at the moment
+// XFAIL: netbsd
+
+// REQUIRES: locale.cs_CZ.ISO8859-2
+
+// <regex>
+
+// template <class BidirectionalIterator, class Allocator, class charT, class traits>
+//     bool
+//     regex_match(BidirectionalIterator first, BidirectionalIterator last,
+//                  match_results<BidirectionalIterator, Allocator>& m,
+//                  const basic_regex<charT, traits>& e,
+//                  regex_constants::match_flag_type flags = regex_constants::match_default);
+
+// TODO: investigation needed
+// XFAIL: linux-gnu, freebsd
+
+#include <regex>
+#include <cassert>
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#include "platform_support.h" // locale name macros
+
+int main(int, char**)
+{
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(std::regex_match(s, m, std::wregex(L"[a[=M=]z]")));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"Ch";
+        assert(std::regex_match(s, m, std::wregex(L"[a[.ch.]z]",
+                   std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(!std::regex_match(s, m, std::wregex(L"[a[=M=]z]")));
+        assert(m.size() == 0);
+    }
+    return 0;
+}
diff --git a/libcxx/test/std/re/re.alg/re.alg.match/ecma.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.match/ecma.pass.cpp
--- a/libcxx/test/std/re/re.alg/re.alg.match/ecma.pass.cpp
+++ b/libcxx/test/std/re/re.alg/re.alg.match/ecma.pass.cpp
@@ -6,10 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// NetBSD does not support LC_COLLATE at the moment
-// XFAIL: netbsd
-
-// REQUIRES: locale.cs_CZ.ISO8859-2
 
 // <regex>
 
@@ -20,16 +16,11 @@
 //                  const basic_regex<charT, traits>& e,
 //                  regex_constants::match_flag_type flags = regex_constants::match_default);
 
-// TODO: investigation needed
-// XFAIL: linux-gnu
-
 #include <regex>
 #include <cassert>
 #include "test_macros.h"
 #include "test_iterators.h"
 
-#include "platform_support.h" // locale name macros
-
 int main(int, char**)
 {
     {
@@ -606,38 +597,6 @@
         assert(!std::regex_match(s, m, std::regex("[a[.hyphen.]z]")));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(std::regex_match(s, m, std::regex("[a[=M=]z]")));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::cmatch m;
-        const char s[] = "Ch";
-        assert(std::regex_match(s, m, std::regex("[a[.ch.]z]",
-                   std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
     {
         std::cmatch m;
         const char s[] = "foobar";
@@ -650,13 +609,6 @@
         assert(std::regex_match(s, s+7, m, std::regex("[abfor\\0]*")));
         assert(m.size() == 1);
     }
-    std::locale::global(std::locale("C"));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(!std::regex_match(s, m, std::regex("[a[=M=]z]")));
-        assert(m.size() == 0);
-    }
     {
         std::cmatch m;
         const char s[] = "01a45cef9";
@@ -1292,45 +1244,6 @@
         assert(!std::regex_match(s, m, std::wregex(L"[a[.hyphen.]z]")));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(std::regex_match(s, m, std::wregex(L"[a[=M=]z]")));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"Ch";
-        assert(std::regex_match(s, m, std::wregex(L"[a[.ch.]z]",
-                   std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(!std::regex_match(s, m, std::wregex(L"[a[=M=]z]")));
-        assert(m.size() == 0);
-    }
     {
         std::wcmatch m;
         const wchar_t s[] = L"01a45cef9";
diff --git a/libcxx/test/std/re/re.alg/re.alg.match/extended.locale.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.match/extended.locale.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/re/re.alg/re.alg.match/extended.locale.pass.cpp
@@ -0,0 +1,118 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// NetBSD does not support LC_COLLATE at the moment
+// XFAIL: netbsd
+
+// REQUIRES: locale.cs_CZ.ISO8859-2
+
+// <regex>
+
+// template <class BidirectionalIterator, class Allocator, class charT, class traits>
+//     bool
+//     regex_match(BidirectionalIterator first, BidirectionalIterator last,
+//                  match_results<BidirectionalIterator, Allocator>& m,
+//                  const basic_regex<charT, traits>& e,
+//                  regex_constants::match_flag_type flags = regex_constants::match_default);
+
+// TODO: investigation needed
+// XFAIL: linux-gnu, freebsd
+
+#include <regex>
+#include <cassert>
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#include "platform_support.h" // locale name macros
+
+int main(int, char**)
+{
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(std::regex_match(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::extended)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::cmatch m;
+        const char s[] = "Ch";
+        assert(std::regex_match(s, m, std::regex("[a[.ch.]z]",
+                   std::regex_constants::extended | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(!std::regex_match(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::extended)));
+        assert(m.size() == 0);
+    }
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::extended)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"Ch";
+        assert(std::regex_match(s, m, std::wregex(L"[a[.ch.]z]",
+                   std::regex_constants::extended | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(!std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::extended)));
+        assert(m.size() == 0);
+    }
+    return 0;
+}
diff --git a/libcxx/test/std/re/re.alg/re.alg.match/extended.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.match/extended.pass.cpp
--- a/libcxx/test/std/re/re.alg/re.alg.match/extended.pass.cpp
+++ b/libcxx/test/std/re/re.alg/re.alg.match/extended.pass.cpp
@@ -6,11 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// NetBSD does not support LC_COLLATE at the moment
-// XFAIL: netbsd
-
-// REQUIRES: locale.cs_CZ.ISO8859-2
-
 // <regex>
 
 // template <class BidirectionalIterator, class Allocator, class charT, class traits>
@@ -20,16 +15,11 @@
 //                  const basic_regex<charT, traits>& e,
 //                  regex_constants::match_flag_type flags = regex_constants::match_default);
 
-// TODO: investigation needed
-// XFAIL: linux-gnu
-
 #include <regex>
 #include <cassert>
 #include "test_macros.h"
 #include "test_iterators.h"
 
-#include "platform_support.h" // locale name macros
-
 int main(int, char**)
 {
     {
@@ -639,47 +629,6 @@
                                                  std::regex_constants::extended)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(std::regex_match(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::extended)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::cmatch m;
-        const char s[] = "Ch";
-        assert(std::regex_match(s, m, std::regex("[a[.ch.]z]",
-                   std::regex_constants::extended | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(!std::regex_match(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::extended)));
-        assert(m.size() == 0);
-    }
     {
         std::cmatch m;
         const char s[] = "01a45cef9";
@@ -1323,47 +1272,6 @@
                                                  std::regex_constants::extended)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::extended)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"Ch";
-        assert(std::regex_match(s, m, std::wregex(L"[a[.ch.]z]",
-                   std::regex_constants::extended | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(!std::regex_match(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::extended)));
-        assert(m.size() == 0);
-    }
     {
         std::wcmatch m;
         const wchar_t s[] = L"01a45cef9";
diff --git a/libcxx/test/std/re/re.alg/re.alg.search/awk.locale.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.search/awk.locale.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/re/re.alg/re.alg.search/awk.locale.pass.cpp
@@ -0,0 +1,118 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// NetBSD does not support LC_COLLATE at the moment
+// XFAIL: netbsd
+
+// REQUIRES: locale.cs_CZ.ISO8859-2
+
+// <regex>
+
+// template <class BidirectionalIterator, class Allocator, class charT, class traits>
+//     bool
+//     regex_search(BidirectionalIterator first, BidirectionalIterator last,
+//                  match_results<BidirectionalIterator, Allocator>& m,
+//                  const basic_regex<charT, traits>& e,
+//                  regex_constants::match_flag_type flags = regex_constants::match_default);
+
+// TODO: investigation needed
+// XFAIL: linux-gnu, freebsd
+
+#include <regex>
+#include <cassert>
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#include "platform_support.h" // locale name macros
+
+int main(int, char**)
+{
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(std::regex_search(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::awk)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::cmatch m;
+        const char s[] = "Ch";
+        assert(std::regex_search(s, m, std::regex("[a[.ch.]z]",
+                   std::regex_constants::awk | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(!std::regex_search(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::awk)));
+        assert(m.size() == 0);
+    }
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::awk)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"Ch";
+        assert(std::regex_search(s, m, std::wregex(L"[a[.ch.]z]",
+                   std::regex_constants::awk | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(!std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::awk)));
+        assert(m.size() == 0);
+    }
+    return 0;
+}
diff --git a/libcxx/test/std/re/re.alg/re.alg.search/awk.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.search/awk.pass.cpp
--- a/libcxx/test/std/re/re.alg/re.alg.search/awk.pass.cpp
+++ b/libcxx/test/std/re/re.alg/re.alg.search/awk.pass.cpp
@@ -6,10 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// NetBSD does not support LC_COLLATE at the moment
-// XFAIL: netbsd
-
-// REQUIRES: locale.cs_CZ.ISO8859-2
 
 // <regex>
 
@@ -20,16 +16,11 @@
 //                  const basic_regex<charT, traits>& e,
 //                  regex_constants::match_flag_type flags = regex_constants::match_default);
 
-// TODO: investigation needed
-// XFAIL: linux-gnu
-
 #include <regex>
 #include <cassert>
 #include "test_macros.h"
 #include "test_iterators.h"
 
-#include "platform_support.h" // locale name macros
-
 int main(int, char**)
 {
     {
@@ -693,47 +684,6 @@
                                                  std::regex_constants::awk)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(std::regex_search(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::awk)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::cmatch m;
-        const char s[] = "Ch";
-        assert(std::regex_search(s, m, std::regex("[a[.ch.]z]",
-                   std::regex_constants::awk | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(!std::regex_search(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::awk)));
-        assert(m.size() == 0);
-    }
     {
         std::cmatch m;
         const char s[] = "01a45cef9";
@@ -1464,47 +1414,6 @@
                                                  std::regex_constants::awk)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::awk)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"Ch";
-        assert(std::regex_search(s, m, std::wregex(L"[a[.ch.]z]",
-                   std::regex_constants::awk | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(!std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::awk)));
-        assert(m.size() == 0);
-    }
     {
         std::wcmatch m;
         const wchar_t s[] = L"01a45cef9";
diff --git a/libcxx/test/std/re/re.alg/re.alg.search/basic.locale.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.search/basic.locale.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/re/re.alg/re.alg.search/basic.locale.pass.cpp
@@ -0,0 +1,118 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// NetBSD does not support LC_COLLATE at the moment
+// XFAIL: netbsd
+
+// REQUIRES: locale.cs_CZ.ISO8859-2
+
+// <regex>
+
+// template <class BidirectionalIterator, class Allocator, class charT, class traits>
+//     bool
+//     regex_search(BidirectionalIterator first, BidirectionalIterator last,
+//                  match_results<BidirectionalIterator, Allocator>& m,
+//                  const basic_regex<charT, traits>& e,
+//                  regex_constants::match_flag_type flags = regex_constants::match_default);
+
+// TODO: investigation needed
+// XFAIL: linux-gnu, freebsd
+
+#include <regex>
+#include <cassert>
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#include "platform_support.h" // locale name macros
+
+int main(int, char**)
+{
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(std::regex_search(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::basic)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::cmatch m;
+        const char s[] = "Ch";
+        assert(std::regex_search(s, m, std::regex("[a[.ch.]z]",
+                   std::regex_constants::basic | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(!std::regex_search(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::basic)));
+        assert(m.size() == 0);
+    }
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::basic)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"Ch";
+        assert(std::regex_search(s, m, std::wregex(L"[a[.ch.]z]",
+                   std::regex_constants::basic | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(!std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::basic)));
+        assert(m.size() == 0);
+    }
+    return 0;
+}
diff --git a/libcxx/test/std/re/re.alg/re.alg.search/basic.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.search/basic.pass.cpp
--- a/libcxx/test/std/re/re.alg/re.alg.search/basic.pass.cpp
+++ b/libcxx/test/std/re/re.alg/re.alg.search/basic.pass.cpp
@@ -6,10 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// NetBSD does not support LC_COLLATE at the moment
-// XFAIL: netbsd
-
-// REQUIRES: locale.cs_CZ.ISO8859-2
 
 // <regex>
 
@@ -20,16 +16,11 @@
 //                  const basic_regex<charT, traits>& e,
 //                  regex_constants::match_flag_type flags = regex_constants::match_default);
 
-// TODO: investigation needed
-// XFAIL: linux-gnu
-
 #include <regex>
 #include <cassert>
 #include "test_macros.h"
 #include "test_iterators.h"
 
-#include "platform_support.h" // locale name macros
-
 int main(int, char**)
 {
     {
@@ -695,47 +686,6 @@
                                                  std::regex_constants::basic)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(std::regex_search(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::basic)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::cmatch m;
-        const char s[] = "Ch";
-        assert(std::regex_search(s, m, std::regex("[a[.ch.]z]",
-                   std::regex_constants::basic | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(!std::regex_search(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::basic)));
-        assert(m.size() == 0);
-    }
     {
         std::cmatch m;
         const char s[] = "01a45cef9";
@@ -1453,47 +1403,6 @@
                                                  std::regex_constants::basic)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::basic)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"Ch";
-        assert(std::regex_search(s, m, std::wregex(L"[a[.ch.]z]",
-                   std::regex_constants::basic | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(!std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::basic)));
-        assert(m.size() == 0);
-    }
     {
         std::wcmatch m;
         const wchar_t s[] = L"01a45cef9";
diff --git a/libcxx/test/std/re/re.alg/re.alg.search/ecma.locale.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.search/ecma.locale.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/re/re.alg/re.alg.search/ecma.locale.pass.cpp
@@ -0,0 +1,114 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// NetBSD does not support LC_COLLATE at the moment
+// XFAIL: netbsd
+
+// REQUIRES: locale.cs_CZ.ISO8859-2
+
+// <regex>
+
+// template <class BidirectionalIterator, class Allocator, class charT, class traits>
+//     bool
+//     regex_search(BidirectionalIterator first, BidirectionalIterator last,
+//                  match_results<BidirectionalIterator, Allocator>& m,
+//                  const basic_regex<charT, traits>& e,
+//                  regex_constants::match_flag_type flags = regex_constants::match_default);
+
+// TODO: investigation needed
+// XFAIL: linux-gnu, freebsd
+
+#include <regex>
+#include <cassert>
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#include "platform_support.h" // locale name macros
+
+int main(int, char**)
+{
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(std::regex_search(s, m, std::regex("[a[=M=]z]")));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::cmatch m;
+        const char s[] = "Ch";
+        assert(std::regex_search(s, m, std::regex("[a[.ch.]z]",
+                   std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(!std::regex_search(s, m, std::regex("[a[=M=]z]")));
+        assert(m.size() == 0);
+    }
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(std::regex_search(s, m, std::wregex(L"[a[=M=]z]")));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"Ch";
+        assert(std::regex_search(s, m, std::wregex(L"[a[.ch.]z]",
+                   std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(!std::regex_search(s, m, std::wregex(L"[a[=M=]z]")));
+        assert(m.size() == 0);
+    }
+    return 0;
+}
diff --git a/libcxx/test/std/re/re.alg/re.alg.search/ecma.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.search/ecma.pass.cpp
--- a/libcxx/test/std/re/re.alg/re.alg.search/ecma.pass.cpp
+++ b/libcxx/test/std/re/re.alg/re.alg.search/ecma.pass.cpp
@@ -6,10 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// NetBSD does not support LC_COLLATE at the moment
-// XFAIL: netbsd
-
-// REQUIRES: locale.cs_CZ.ISO8859-2
 
 // <regex>
 
@@ -20,16 +16,11 @@
 //                  const basic_regex<charT, traits>& e,
 //                  regex_constants::match_flag_type flags = regex_constants::match_default);
 
-// TODO: investigation needed
-// XFAIL: linux-gnu
-
 #include <regex>
 #include <cassert>
 #include "test_macros.h"
 #include "test_iterators.h"
 
-#include "platform_support.h" // locale name macros
-
 int main(int, char**)
 {
     {
@@ -675,45 +666,6 @@
         assert(!std::regex_search(s, m, std::regex("[a[.hyphen.]z]")));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(std::regex_search(s, m, std::regex("[a[=M=]z]")));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::cmatch m;
-        const char s[] = "Ch";
-        assert(std::regex_search(s, m, std::regex("[a[.ch.]z]",
-                   std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(!std::regex_search(s, m, std::regex("[a[=M=]z]")));
-        assert(m.size() == 0);
-    }
     {
         std::cmatch m;
         const char s[] = "01a45cef9";
@@ -1454,45 +1406,6 @@
         assert(!std::regex_search(s, m, std::wregex(L"[a[.hyphen.]z]")));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(std::regex_search(s, m, std::wregex(L"[a[=M=]z]")));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"Ch";
-        assert(std::regex_search(s, m, std::wregex(L"[a[.ch.]z]",
-                   std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(!std::regex_search(s, m, std::wregex(L"[a[=M=]z]")));
-        assert(m.size() == 0);
-    }
     {
         std::wcmatch m;
         const wchar_t s[] = L"01a45cef9";
diff --git a/libcxx/test/std/re/re.alg/re.alg.search/extended.locale.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.search/extended.locale.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/std/re/re.alg/re.alg.search/extended.locale.pass.cpp
@@ -0,0 +1,118 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// NetBSD does not support LC_COLLATE at the moment
+// XFAIL: netbsd
+
+// REQUIRES: locale.cs_CZ.ISO8859-2
+
+// <regex>
+
+// template <class BidirectionalIterator, class Allocator, class charT, class traits>
+//     bool
+//     regex_search(BidirectionalIterator first, BidirectionalIterator last,
+//                  match_results<BidirectionalIterator, Allocator>& m,
+//                  const basic_regex<charT, traits>& e,
+//                  regex_constants::match_flag_type flags = regex_constants::match_default);
+
+// TODO: investigation needed
+// XFAIL: linux-gnu, freebsd
+
+#include <regex>
+#include <cassert>
+#include "test_macros.h"
+#include "test_iterators.h"
+
+#include "platform_support.h" // locale name macros
+
+int main(int, char**)
+{
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(std::regex_search(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::extended)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::cmatch m;
+        const char s[] = "Ch";
+        assert(std::regex_search(s, m, std::regex("[a[.ch.]z]",
+                   std::regex_constants::extended | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::cmatch m;
+        const char s[] = "m";
+        assert(!std::regex_search(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::extended)));
+        assert(m.size() == 0);
+    }
+    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::extended)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"Ch";
+        assert(std::regex_search(s, m, std::wregex(L"[a[.ch.]z]",
+                   std::regex_constants::extended | std::regex_constants::icase)));
+        assert(m.size() == 1);
+        assert(!m.prefix().matched);
+        assert(m.prefix().first == s);
+        assert(m.prefix().second == m[0].first);
+        assert(!m.suffix().matched);
+        assert(m.suffix().first == m[0].second);
+        assert(m.suffix().second == m[0].second);
+        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
+        assert(m.position(0) == 0);
+        assert(m.str(0) == s);
+    }
+    std::locale::global(std::locale("C"));
+    {
+        std::wcmatch m;
+        const wchar_t s[] = L"m";
+        assert(!std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
+                                                 std::regex_constants::extended)));
+        assert(m.size() == 0);
+    }
+    return 0;
+}
diff --git a/libcxx/test/std/re/re.alg/re.alg.search/extended.pass.cpp b/libcxx/test/std/re/re.alg/re.alg.search/extended.pass.cpp
--- a/libcxx/test/std/re/re.alg/re.alg.search/extended.pass.cpp
+++ b/libcxx/test/std/re/re.alg/re.alg.search/extended.pass.cpp
@@ -6,10 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// NetBSD does not support LC_COLLATE at the moment
-// XFAIL: netbsd
-
-// REQUIRES: locale.cs_CZ.ISO8859-2
 
 // <regex>
 
@@ -20,16 +16,11 @@
 //                  const basic_regex<charT, traits>& e,
 //                  regex_constants::match_flag_type flags = regex_constants::match_default);
 
-// TODO: investigation needed
-// XFAIL: linux-gnu
-
 #include <regex>
 #include <cassert>
 #include "test_macros.h"
 #include "test_iterators.h"
 
-#include "platform_support.h" // locale name macros
-
 int main(int, char**)
 {
     {
@@ -711,47 +702,6 @@
                                                  std::regex_constants::extended)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(std::regex_search(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::extended)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::cmatch m;
-        const char s[] = "Ch";
-        assert(std::regex_search(s, m, std::regex("[a[.ch.]z]",
-                   std::regex_constants::extended | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<char>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::cmatch m;
-        const char s[] = "m";
-        assert(!std::regex_search(s, m, std::regex("[a[=M=]z]",
-                                                 std::regex_constants::extended)));
-        assert(m.size() == 0);
-    }
     {
         std::cmatch m;
         const char s[] = "01a45cef9";
@@ -1485,47 +1435,6 @@
                                                  std::regex_constants::extended)));
         assert(m.size() == 0);
     }
-    std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::extended)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"Ch";
-        assert(std::regex_search(s, m, std::wregex(L"[a[.ch.]z]",
-                   std::regex_constants::extended | std::regex_constants::icase)));
-        assert(m.size() == 1);
-        assert(!m.prefix().matched);
-        assert(m.prefix().first == s);
-        assert(m.prefix().second == m[0].first);
-        assert(!m.suffix().matched);
-        assert(m.suffix().first == m[0].second);
-        assert(m.suffix().second == m[0].second);
-        assert(m.length(0) >= 0 && static_cast<size_t>(m.length(0)) == std::char_traits<wchar_t>::length(s));
-        assert(m.position(0) == 0);
-        assert(m.str(0) == s);
-    }
-    std::locale::global(std::locale("C"));
-    {
-        std::wcmatch m;
-        const wchar_t s[] = L"m";
-        assert(!std::regex_search(s, m, std::wregex(L"[a[=M=]z]",
-                                                 std::regex_constants::extended)));
-        assert(m.size() == 0);
-    }
     {
         std::wcmatch m;
         const wchar_t s[] = L"01a45cef9";
diff --git a/libcxx/utils/libcxx/test/features.py b/libcxx/utils/libcxx/test/features.py
--- a/libcxx/utils/libcxx/test/features.py
+++ b/libcxx/utils/libcxx/test/features.py
@@ -148,7 +148,8 @@
   Feature(name='darwin', when=lambda cfg: '__APPLE__' in compilerMacros(cfg)),
   Feature(name='windows', when=lambda cfg: '_WIN32' in compilerMacros(cfg)),
   Feature(name='linux', when=lambda cfg: '__linux__' in compilerMacros(cfg)),
-  Feature(name='netbsd', when=lambda cfg: '__NetBSD__' in compilerMacros(cfg))
+  Feature(name='netbsd', when=lambda cfg: '__NetBSD__' in compilerMacros(cfg)),
+  Feature(name='freebsd', when=lambda cfg: '__FreeBSD__' in compilerMacros(cfg))
 ]