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diff --git a/libstdc++-v3/testsuite/22_locale/locale/cons/4.cc b/libstdc++-v3/testsuite/22_locale/locale/cons/4.cc
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+++ b/libstdc++-v3/testsuite/22_locale/locale/cons/4.cc
@@ -0,0 +1,49 @@
+// { dg-require-namedlocale "it_IT" }
+
+// 2000-09-13 Benjamin Kosnik <bkoz@redhat.com>
+
+// Copyright (C) 2000, 2001, 2002, 2003, 2005, 2009 Free Software Foundation
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// 22.1.1.2 locale constructors and destructors [lib.locale.cons]
+
+#include <cwchar> // for mbstate_t
+#include <cstdlib>
+#include <locale>
+#include <stdexcept>
+#include <testsuite_hooks.h>
+
+// libstdc++/7811
+void test03()
+{
+  bool test __attribute__((unused)) = true;
+#ifdef _GLIBCXX_HAVE_SETENV 
+  const char* LC_ALL_orig = getenv("LC_ALL");
+  if (!setenv("LC_ALL", "it_IT", 1))
+    {
+      std::locale loc = std::locale(""); 
+      VERIFY( loc.name() == "it_IT" );
+      setenv("LC_ALL", LC_ALL_orig ? LC_ALL_orig : "", 1);
+    }
+#endif
+}
+
+int main()
+{
+  test03();
+  return 0;
+}