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diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/seekg/wchar_t/sstream.cc b/libstdc++-v3/testsuite/27_io/basic_istream/seekg/wchar_t/sstream.cc
new file mode 100644
index 00000000..dcc196b8
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/seekg/wchar_t/sstream.cc
@@ -0,0 +1,134 @@
+// 2000-06-29 bkoz
+
+// Copyright (C) 2000, 2001, 2002, 2003, 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/>.
+
+// 27.6.1.3 unformatted input functions
+// NB: ostream has a particular "seeks" category. Adopt this for istreams too.
+// @require@ %-*.tst %-*.txt
+// @diff@ %-*.tst %-*.txt
+
+#include <istream>
+#include <sstream>
+#include <fstream>
+#include <testsuite_hooks.h>
+
+// stringstreams
+void test05(void)
+{
+  typedef std::istream::off_type off_type;
+
+  bool test __attribute__((unused)) = true;
+  std::wistream::pos_type pos01, pos02, pos03, pos04, pos05, pos06;
+  std::ios_base::iostate state01, state02;
+  const char str_lit01[] = "wistream_seeks-1.tst";
+  std::wifstream if01(str_lit01);
+  std::wifstream if02(str_lit01);
+  std::wifstream if03(str_lit01);
+  VERIFY( if01.good() );
+  VERIFY( if02.good() );
+  VERIFY( if03.good() );
+
+  std::wstringbuf strbuf01(std::ios_base::in | std::ios_base::out);
+  if01 >> &strbuf01; 
+  // initialize stringbufs that are ios_base::out
+  std::wstringbuf strbuf03(strbuf01.str(), std::ios_base::out);
+  // initialize stringbufs that are ios_base::in
+  std::wstringbuf strbuf02(strbuf01.str(), std::ios_base::in);
+
+  std::wistream is01(&strbuf01);
+  std::wistream is02(&strbuf02);
+  std::wistream is03(&strbuf03);
+
+  // pos_type tellg()
+  // in | out
+  pos01 = is01.tellg();
+  pos02 = is01.tellg();
+  pos03 = is02.tellg();
+  pos04 = is02.tellg();
+  pos05 = is03.tellg();
+  pos06 = is03.tellg();
+
+  // istream& seekg(pos_type)
+  // istream& seekg(off_type, ios_base::seekdir)
+
+  // cur 
+  // NB: see library issues list 136. It's the v-3 interp that seekg
+  // only sets the input buffer, or else istreams with buffers that
+  // have _M_mode == ios_base::out will fail to have consistency
+  // between seekg and tellg.
+  state01 = is01.rdstate();
+  is01.seekg(10, std::ios_base::cur);
+  state02 = is01.rdstate();
+  pos01 = is01.tellg(); 
+  VERIFY( pos01 == pos02 + off_type(10) ); 
+  VERIFY( state01 == state02 );
+  pos02 = is01.tellg(); 
+  VERIFY( pos02 == pos01 ); 
+
+  state01 = is02.rdstate();
+  is02.seekg(10, std::ios_base::cur);
+  state02 = is02.rdstate();
+  pos03 = is02.tellg(); 
+  VERIFY( pos03 == pos04 + off_type(10) ); 
+  VERIFY( state01 == state02 );
+  pos04 = is02.tellg(); 
+  VERIFY( pos03 == pos04 ); 
+
+  state01 = is03.rdstate();
+  is03.seekg(10, std::ios_base::cur);
+  state02 = is03.rdstate();
+  pos05 = is03.tellg(); 
+  VERIFY( pos05 == pos06 ); // as only out buffer 
+  VERIFY( state01 != state02 );
+  pos06 = is03.tellg(); 
+  VERIFY( pos05 == pos06 ); 
+
+  // beg
+  state01 = is01.rdstate();
+  is01.seekg(20, std::ios_base::beg);
+  state02 = is01.rdstate();
+  pos01 = is01.tellg(); 
+  VERIFY( pos01 == pos02 + off_type(10) ); 
+  VERIFY( state01 == state02 );
+  pos02 = is01.tellg(); 
+  VERIFY( pos02 == pos01 ); 
+
+  state01 = is02.rdstate();
+  is02.seekg(20, std::ios_base::beg);
+  state02 = is02.rdstate();
+  pos03 = is02.tellg(); 
+  VERIFY( pos03 == pos04 + off_type(10) ); 
+  VERIFY( state01 == state02 );
+  pos04 = is02.tellg(); 
+  VERIFY( pos03 == pos04 ); 
+
+  state01 = is03.rdstate();
+  is03.seekg(20, std::ios_base::beg);
+  state02 = is03.rdstate();
+  pos05 = is03.tellg(); 
+  VERIFY( pos05 == pos06 ); // as only out buffer 
+  VERIFY( state01 == state02 );
+  pos06 = is03.tellg(); 
+  VERIFY( pos05 == pos06 ); 
+}
+
+int main()
+{
+  test05();
+  return 0;
+}