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diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/3.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/3.cc
new file mode 100644
index 00000000..bdb3989c
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/3.cc
@@ -0,0 +1,51 @@
+// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
+
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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
+
+// { dg-require-fileio "" }
+
+#include <fstream>
+#include <cstring>
+#include <testsuite_hooks.h>
+
+void test03()
+{
+  using namespace std;
+
+  bool test __attribute__((unused)) = true;
+  char buf[512];
+  const char* strlit = "how to tell a story and other essays: mark twain";
+  const size_t strlitsize = std::strlen(strlit);
+  filebuf fbuf01;
+  // NB: +2 otherwise sputn is optimized to a direct write,
+  // bypassing the buffer.
+  fbuf01.pubsetbuf(buf, strlitsize + 2);
+  fbuf01.open("tmp_setbuf3", ios_base::out);
+
+  fbuf01.sputn(strlit, strlitsize);
+  VERIFY( std::strncmp(strlit, buf, strlitsize) == 0 );
+}
+
+int main() 
+{
+  test03();
+  return 0;
+}