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diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/4.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/4.cc
new file mode 100644
index 00000000..6ec72d29
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/4.cc
@@ -0,0 +1,55 @@
+// { dg-require-namedlocale "" }
+
+// 2003-09-04  Petur Runolfsson  <peturr02@ru.is>
+// Adapted from 27_io/basic_filebuf/underflow/char/2.cc
+
+// Copyright (C) 2003, 2005, 2009 Free Software Foundation, Inc.
+//
+// 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+#include <fstream>
+#include <locale>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+
+  locale loc (locale("se_NO.UTF-8"));
+  wfilebuf fb_out, fb_in_out;
+  fb_out.pubimbue(loc);
+  fb_in_out.pubimbue(loc);
+  
+  fb_out.open("tmp_underflow.tst", ios::out);
+  fb_out.sputc(L'S');
+  fb_out.sputc(L'T');
+  fb_out.close();
+
+  fb_in_out.open("tmp_underflow.tst", ios::in | ios::out);
+  while (fb_in_out.sbumpc() != wfilebuf::traits_type::eof());
+
+  VERIFY( fb_in_out.sputc(L'x') == L'x' );
+  fb_in_out.close();
+}
+
+int main()
+{
+  test01();
+  return 0;
+}