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diff --git a/mpfr/tests/tisqrt.c b/mpfr/tests/tisqrt.c
new file mode 100644
index 00000000..a2115335
--- /dev/null
+++ b/mpfr/tests/tisqrt.c
@@ -0,0 +1,94 @@
+/* Test file for __gmpfr_isqrt and __gmpfr_cuberoot internal functions.
+
+Copyright 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"
+
+static void
+tst_isqrt (unsigned long n, unsigned long r)
+{
+  unsigned long i;
+
+  i = __gmpfr_isqrt (n);
+  if (i != r)
+    {
+      printf ("Error in __gmpfr_isqrt (%lu): got %lu instead of %lu\n",
+              n, i, r);
+      exit (1);
+    }
+}
+
+static void
+tst_icbrt (unsigned long n, unsigned long r)
+{
+  unsigned long i;
+
+  i = __gmpfr_cuberoot (n);
+  if (i != r)
+    {
+      printf ("Error in __gmpfr_cuberoot (%lu): got %lu instead of %lu\n",
+              n, i, r);
+      exit (1);
+    }
+}
+
+int
+main (void)
+{
+  unsigned long c, i;
+
+  tests_start_mpfr ();
+
+  tst_isqrt (0, 0);
+  tst_isqrt (1, 1);
+  tst_isqrt (2, 1);
+  for (i = 2; i <= 65535; i++)
+    {
+      tst_isqrt (i * i - 1, i - 1);
+      tst_isqrt (i * i, i);
+    }
+  tst_isqrt (4294967295UL, 65535);
+
+  tst_icbrt (0, 0);
+  tst_icbrt (1, 1);
+  tst_icbrt (2, 1);
+  tst_icbrt (3, 1);
+  for (i = 2; i <= 1625; i++)
+    {
+      c = i * i * i;
+      tst_icbrt (c - 4, i - 1);
+      tst_icbrt (c - 3, i - 1);
+      tst_icbrt (c - 2, i - 1);
+      tst_icbrt (c - 1, i - 1);
+      tst_icbrt (c, i);
+      tst_icbrt (c + 1, i);
+      tst_icbrt (c + 2, i);
+      tst_icbrt (c + 3, i);
+      tst_icbrt (c + 4, i);
+    }
+  tst_icbrt (4294967295UL, 1625);
+
+  tests_end_mpfr ();
+  return 0;
+}