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diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/wchar_t/1.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/wchar_t/1.cc
new file mode 100644
index 00000000..a64f4558
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/wchar_t/1.cc
@@ -0,0 +1,51 @@
+// Copyright (C) 2003, 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 <testsuite_hooks.h>
+
+void test01()
+{
+  using namespace std;
+
+  bool test __attribute__((unused)) = true;
+  const char* name = "tmp_sync_1";
+
+  wfilebuf fb;
+
+  fb.open(name, ios_base::in | ios_base::out | ios_base::trunc);
+  fb.sputn(L"abc", 3);
+
+  fb.pubseekoff(0, ios_base::beg);
+  fb.sputc(L'1');
+
+  // Sync can't be used to switch from write mode to read mode.
+  fb.pubsync();
+
+  wfilebuf::int_type c = fb.sbumpc();
+  VERIFY( c == wfilebuf::traits_type::eof() );
+
+  fb.close();
+}
+
+int main()
+{
+  test01();
+  return 0;
+}