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diff --git a/mpfr/tests/tlog1p.c b/mpfr/tests/tlog1p.c
new file mode 100644
index 00000000..27f42cc8
--- /dev/null
+++ b/mpfr/tests/tlog1p.c
@@ -0,0 +1,136 @@
+/* Test file for mpfr_log1p.
+
+Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+Contributed by the Arenaire and Cacao projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or (at your
+option) any later version.
+
+The GNU MPFR 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+MA 02110-1301, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "mpfr-test.h"
+
+#ifdef CHECK_EXTERNAL
+static int
+test_log1p (mpfr_ptr a, mpfr_srcptr b, mp_rnd_t rnd_mode)
+{
+  int res;
+  int ok = rnd_mode == GMP_RNDN && mpfr_number_p (b) && mpfr_get_prec (a)>=53;
+  if (ok)
+    {
+      mpfr_print_raw (b);
+    }
+  res = mpfr_log1p (a, b, rnd_mode);
+  if (ok)
+    {
+      printf (" ");
+      mpfr_print_raw (a);
+      printf ("\n");
+    }
+  return res;
+}
+#else
+#define test_log1p mpfr_log1p
+#endif
+
+#define TEST_FUNCTION test_log1p
+#define TEST_RANDOM_EMAX 80
+#include "tgeneric.c"
+
+static void
+special (void)
+{
+  mpfr_t x;
+  int inex;
+
+  mpfr_init (x);
+
+  mpfr_set_nan (x);
+  inex = test_log1p (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
+
+  mpfr_set_inf (x, -1);
+  inex = test_log1p (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
+
+  mpfr_set_inf (x, 1);
+  inex = test_log1p (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0);
+
+  mpfr_set_ui (x, 0, GMP_RNDN);
+  inex = test_log1p (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS (x) && inex == 0);
+  mpfr_neg (x, x, GMP_RNDN);
+  inex = test_log1p (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_NEG (x) && inex == 0);
+
+  mpfr_set_si (x, -1, GMP_RNDN);
+  inex = test_log1p (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
+
+  mpfr_set_si (x, -2, GMP_RNDN);
+  inex = test_log1p (x, x, GMP_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
+
+  mpfr_clear (x);
+}
+
+static void
+other (void)
+{
+  mpfr_t x, y;
+
+  /* Bug reported by Guillaume Melquiond on 2006-08-14. */
+  mpfr_init2 (x, 53);
+  mpfr_set_str (x, "-1.5e4f72873ed9a@-100", 16, GMP_RNDN);
+  mpfr_init2 (y, 57);
+  mpfr_log1p (y, x, GMP_RNDU);
+  if (mpfr_cmp (x, y) != 0)
+    {
+      printf ("Error in tlog1p for x = ");
+      mpfr_out_str (stdout, 16, 0, x, GMP_RNDN);
+      printf (", rnd = GMP_RNDU\nExpected ");
+      mpfr_out_str (stdout, 16, 15, x, GMP_RNDN);
+      printf ("\nGot      ");
+      mpfr_out_str (stdout, 16, 15, y, GMP_RNDN);
+      printf ("\n");
+      exit (1);
+    }
+
+  mpfr_clear (y);
+  mpfr_clear (x);
+  return;
+}
+
+int
+main (int argc, char *argv[])
+{
+  tests_start_mpfr ();
+
+  special ();
+  other ();
+
+  test_generic (2, 100, 50);
+
+  data_check ("data/log1p", mpfr_log1p, "mpfr_log1p");
+  bad_cases (mpfr_log1p, mpfr_expm1, "mpfr_log1p", 256, -64, 40,
+             4, 128, 800, 40);
+
+  tests_end_mpfr ();
+  return 0;
+}