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diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/operations/find/wchar_t/4.cc b/libstdc++-v3/testsuite/21_strings/basic_string/operations/find/wchar_t/4.cc
new file mode 100644
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+++ b/libstdc++-v3/testsuite/21_strings/basic_string/operations/find/wchar_t/4.cc
@@ -0,0 +1,42 @@
+// 2007-03-30  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2007-2013 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/>.
+
+// 21.3.6.1 basic_string find
+
+#include <string>
+#include <testsuite_hooks.h>
+
+// libstdc++/31401
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  typedef std::wstring::size_type csize_type;
+  csize_type npos = std::wstring::npos;
+
+  std::wstring use = L"anu";
+  csize_type pos1 = use.find(L"a", npos);
+
+  VERIFY( pos1 == npos );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}