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diff --git a/libstdc++-v3/testsuite/tr1/5_numerical_facilities/special_functions/20_riemann_zeta/check_value_neg.cc b/libstdc++-v3/testsuite/tr1/5_numerical_facilities/special_functions/20_riemann_zeta/check_value_neg.cc
new file mode 100644
index 00000000000..2a86846ea4a
--- /dev/null
+++ b/libstdc++-v3/testsuite/tr1/5_numerical_facilities/special_functions/20_riemann_zeta/check_value_neg.cc
@@ -0,0 +1,133 @@
+// 2007-02-04  Edward Smith-Rowland <3dw4rd@verizon.net>
+//
+// Copyright (C) 2007 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.
+
+//  riemann_zeta
+
+
+//  Compare against values generated by the GNU Scientific Library.
+//  The GSL can be found on the web: http://www.gnu.org/software/gsl/
+
+#include <tr1/cmath>
+#if defined(__TEST_DEBUG)
+#include <iostream>
+#define VERIFY(A) \
+if (!(A)) \
+  { \
+    std::cout << "line " << __LINE__ \
+      << "  max_abs_frac = " << max_abs_frac \
+      << std::endl; \
+  }
+#else
+#include <testsuite_hooks.h>
+#endif
+#include "../testcase.h"
+
+
+// Test data.
+testcase_riemann_zeta<double> data001[] = {
+  { 0.0000000000000000, -10.000000000000000 },
+  { -0.0033669820451019579, -9.8000000000000007 },
+  { -0.0058129517767319039, -9.5999999999999996 },
+  { -0.0072908732290557004, -9.4000000000000004 },
+  { -0.0078420910654484442, -9.1999999999999993 },
+  { -0.0075757575757575803, -9.0000000000000000 },
+  { -0.0066476555677551898, -8.8000000000000007 },
+  { -0.0052400095350859429, -8.5999999999999996 },
+  { -0.0035434308017674959, -8.4000000000000004 },
+  { -0.0017417330388368585, -8.1999999999999993 },
+  { 0.0000000000000000, -8.0000000000000000 },
+  { 0.0015440036789213965, -7.7999999999999998 },
+  { 0.0027852131086497423, -7.5999999999999996 },
+  { 0.0036537321227995880, -7.4000000000000004 },
+  { 0.0041147930817053468, -7.2000000000000002 },
+  { 0.0041666666666666683, -7.0000000000000000 },
+  { 0.0038369975032738366, -6.7999999999999998 },
+  { 0.0031780270571782981, -6.5999999999999996 },
+  { 0.0022611282027338573, -6.4000000000000004 },
+  { 0.0011710237049390511, -6.2000000000000002 },
+  { 0.0000000000000000, -6.0000000000000000 },
+  { -0.0011576366649881879, -5.7999999999999998 },
+  { -0.0022106784318564345, -5.5999999999999996 },
+  { -0.0030755853460586891, -5.4000000000000004 },
+  { -0.0036804380477934787, -5.2000000000000002 },
+  { -0.0039682539682539698, -5.0000000000000000 },
+  { -0.0038996891301999797, -4.7999999999999998 },
+  { -0.0034551830834302711, -4.5999999999999996 },
+  { -0.0026366345018725115, -4.4000000000000004 },
+  { -0.0014687209305056974, -4.2000000000000002 },
+  { 0.0000000000000000, -4.0000000000000000 },
+  { 0.0016960463875825209, -3.7999999999999998 },
+  { 0.0035198355903356747, -3.5999999999999996 },
+  { 0.0053441503206513421, -3.4000000000000004 },
+  { 0.0070119720770910540, -3.2000000000000002 },
+  { 0.0083333333333333350, -3.0000000000000000 },
+  { 0.0090807294856852811, -2.7999999999999998 },
+  { 0.0089824623788396681, -2.5999999999999996 },
+  { 0.0077130239874243630, -2.4000000000000004 },
+  { 0.0048792123593036068, -2.2000000000000002 },
+  { 0.0000000000000000, -2.0000000000000000 },
+  { -0.0075229347765968010, -1.8000000000000007 },
+  { -0.018448986678963775, -1.5999999999999996 },
+  { -0.033764987694047593, -1.4000000000000004 },
+  { -0.054788441243880631, -1.1999999999999993 },
+  { -0.083333333333333398, -1.0000000000000000 },
+  { -0.12198707766977103, -0.80000000000000071 },
+  { -0.17459571193801401, -0.59999999999999964 },
+  { -0.24716546083171492, -0.40000000000000036 },
+  { -0.34966628059831484, -0.19999999999999929 },
+  { -0.49999999999999994, 0.0000000000000000 },
+  { -0.73392092489633953, 0.19999999999999929 },
+  { -1.1347977838669825, 0.40000000000000036 },
+  { -1.9526614482239983, 0.59999999999999964 },
+  { -4.4375384158955677, 0.80000000000000071 },
+};
+
+// Test function.
+template <typename Tp>
+void test001()
+{
+  const Tp eps = std::numeric_limits<Tp>::epsilon();
+  Tp max_abs_diff = -Tp(1);
+  Tp max_abs_frac = -Tp(1);
+  unsigned int num_datum = sizeof(data001)
+                         / sizeof(testcase_riemann_zeta<double>);
+  for (unsigned int i = 0; i < num_datum; ++i)
+    {
+      const Tp f = std::tr1::riemann_zeta(Tp(data001[i].x));
+      const Tp f0 = data001[i].f0;
+      const Tp diff = f - f0;
+      if (std::abs(diff) > max_abs_diff)
+        max_abs_diff = std::abs(diff);
+      if (std::abs(f0) > Tp(10) * eps
+       && std::abs(f) > Tp(10) * eps)
+        {
+          const Tp frac = diff / f0;
+          if (std::abs(frac) > max_abs_frac)
+            max_abs_frac = std::abs(frac);
+        }
+    }
+  VERIFY(max_abs_frac < Tp(5.0000000000000039e-13));
+}
+
+int main(int, char**)
+{
+  test001<double>();
+  return 0;
+}