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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc24.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc24.vhd
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+
+-- Copyright (C) 2001 Bill Billowitch.
+
+-- Some of the work to develop this test suite was done with Air Force
+-- support.  The Air Force and Bill Billowitch assume no
+-- responsibilities for this software.
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs 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 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs 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 VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: tc24.vhd,v 1.2 2001-10-26 16:29:47 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c04s02b00x00p10n01i00024ent IS
+END c04s02b00x00p10n01i00024ent;
+
+ARCHITECTURE c04s02b00x00p10n01i00024arch OF c04s02b00x00p10n01i00024ent IS
+
+BEGIN
+  TESTING: PROCESS
+
+    -- Define an ascending subtype.
+    subtype ASC is INTEGER range 0 to 1;
+
+    -- Define a descending subtype.
+    subtype DES is INTEGER range 1 to 0;
+
+    -- Define a 'previous value' variable.
+    variable PREV : INTEGER;
+
+    variable k : integer := 0;
+    variable l : integer := 0;
+  BEGIN
+    -- Test the direction of the ascending range.
+    PREV := -1;
+    for I in ASC loop
+      if (I > PREV) then
+        PREV := I;
+      else
+        k := 1;
+      end if;
+    end loop;
+
+    -- Test the direction of the descending range.
+    PREV := 2;
+    for I in DES loop
+      if (I < PREV) then
+        PREV := I;
+      else
+        l := 1;
+      end if;
+    end loop;
+    assert NOT( k=0 and l=0 )
+      report "***PASSED TEST:c04s02b00x00p10n01i00024"
+      severity NOTE;
+    assert ( k=0 and l=0 )
+      report "***FAILED TEST: c04s02b00x00p10n01i00024 - The direction of a discrete subtype indication is the same as the direction of the range constraint that appears as the constraint of the subtype indication."
+      severity ERROR;
+    wait;
+  END PROCESS TESTING;
+
+END c04s02b00x00p10n01i00024arch;