--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2011-10-09  Bruno Haible  <bruno@clisp.org>
 
+	Tests for module 'rintl'.
+	* modules/rintl-tests: New file.
+	* tests/test-rintl.c: New file.
+
 	New module 'rintl'.
 	* lib/math.in.h (rintl): New declaration.
 	* lib/rintl.c: New file.

new file mode 100644
--- /dev/null
+++ b/modules/rintl-tests
@@ -0,0 +1,19 @@
+Files:
+tests/test-rintl.c
+tests/minus-zero.h
+tests/infinity.h
+tests/nan.h
+tests/signature.h
+tests/macros.h
+
+Depends-on:
+fpucw
+isnanl-nolibm
+float
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-rintl
+check_PROGRAMS += test-rintl
+test_rintl_LDADD = $(LDADD) @RINTL_LIBM@

new file mode 100644
--- /dev/null
+++ b/tests/test-rintl.c
@@ -0,0 +1,96 @@
+/* Test of rintl() function.
+   Copyright (C) 2010-2011 Free Software Foundation, Inc.
+
+   This program 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 of the License, or
+   (at your option) any later version.
+
+   This program 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 program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (rintl, long double, (long double));
+
+#include <float.h>
+#include <stdio.h>
+
+#include "fpucw.h"
+#include "isnanl-nolibm.h"
+#include "minus-zero.h"
+#include "infinity.h"
+#include "nan.h"
+#include "macros.h"
+
+int
+main ()
+{
+  DECL_LONG_DOUBLE_ROUNDING
+
+  BEGIN_LONG_DOUBLE_ROUNDING ();
+
+  /* Consider the current rounding mode, cf.
+     <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/float.h.html>  */
+  if (FLT_ROUNDS == 1)
+    {
+      /* The current rounding mode is round-to-nearest
+         (the default in IEEE 754).  */
+
+      /* Zero.  */
+      ASSERT (rintl (0.0L) == 0.0L);
+      ASSERT (rintl (minus_zerol) == 0.0L);
+      /* Positive numbers.  */
+      ASSERT (rintl (0.3L) == 0.0L);
+      ASSERT (rintl (0.5L) == 0.0L); /* unlike roundl() */
+      ASSERT (rintl (0.7L) == 1.0L);
+      ASSERT (rintl (1.0L) == 1.0L);
+      ASSERT (rintl (1.5L) == 2.0L);
+      ASSERT (rintl (1.999L) == 2.0L);
+      ASSERT (rintl (2.0L) == 2.0L);
+      ASSERT (rintl (2.1L) == 2.0L);
+      ASSERT (rintl (2.5L) == 2.0L); /* unlike roundl() */
+      ASSERT (rintl (2.7L) == 3.0L);
+      ASSERT (rintl (65535.999L) == 65536.0L);
+      ASSERT (rintl (65536.0L) == 65536.0L);
+      ASSERT (rintl (65536.001L) == 65536.0L);
+      ASSERT (rintl (2.341e31L) == 2.341e31L);
+      /* Negative numbers.  */
+      ASSERT (rintl (-0.3L) == 0.0L);
+      ASSERT (rintl (-0.5L) == 0.0L); /* unlike roundl() */
+      ASSERT (rintl (-0.7L) == -1.0L);
+      ASSERT (rintl (-1.0L) == -1.0L);
+      ASSERT (rintl (-1.5L) == -2.0L);
+      ASSERT (rintl (-1.999L) == -2.0L);
+      ASSERT (rintl (-2.0L) == -2.0L);
+      ASSERT (rintl (-2.1L) == -2.0L);
+      ASSERT (rintl (-2.5L) == -2.0L); /* unlike roundl() */
+      ASSERT (rintl (-2.7L) == -3.0L);
+      ASSERT (rintl (-65535.999L) == -65536.0L);
+      ASSERT (rintl (-65536.0L) == -65536.0L);
+      ASSERT (rintl (-65536.001L) == -65536.0L);
+      ASSERT (rintl (-2.341e31L) == -2.341e31L);
+      /* Infinite numbers.  */
+      ASSERT (rintl (Infinityl ()) == Infinityl ());
+      ASSERT (rintl (- Infinityl ()) == - Infinityl ());
+      /* NaNs.  */
+      ASSERT (isnanl (rintl (NaNl ())));
+
+      return 0;
+    }
+  else
+    {
+      fputs ("Skipping test: non-standard rounding mode\n", stderr);
+      return 77;
+    }
+}