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diff --git a/libstdc++-v3/testsuite/27_io/ostream_sentry.cc b/libstdc++-v3/testsuite/27_io/ostream_sentry.cc
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+++ b/libstdc++-v3/testsuite/27_io/ostream_sentry.cc
@@ -0,0 +1,70 @@
+// 2003-02-12  Paolo Carlini  <pcarlini@unitus.it>
+
+// Copyright (C) 2003 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+// 27.6.2.3 class basic_ostream::sentry
+
+#include <ostream>
+#include <testsuite_hooks.h>
+
+// libstdc++/9563
+struct buf: std::streambuf
+{
+  std::ios *io_;
+  
+  buf (std::ios *io): io_ (io) { }
+  
+  virtual int sync ()
+  {
+    io_->setstate (std::ios::failbit);
+    return 0;
+  }
+};
+
+void
+test01()
+{
+  bool test = true;
+
+  buf b(0);
+  std::ostream strm(&b);
+  
+  buf tb(&strm);
+  std::ostream tied(&tb);
+
+  strm.tie(&tied);
+  std::ostream::sentry s(strm);
+
+  VERIFY( !s );
+}
+
+int main() 
+{
+  test01();
+  return 0;
+}