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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc143.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc143.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: tc143.vhd,v 1.2 2001-10-26 16:29:41 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+package c04s03b02x02p12n01i00143pkg is
+  type fourstate is ('0','1','x','z');
+  function fourstate_to_bit(x : fourstate) return bit;
+  procedure simple ( crude : in bit;
+                     signal refined : out bit);
+end c04s03b02x02p12n01i00143pkg;
+
+package body c04s03b02x02p12n01i00143pkg is
+  procedure simple ( crude : in bit;
+                     signal refined : out bit) is
+  begin
+    refined <= crude after 5 ns;
+  end simple;
+  
+  function fourstate_to_bit(x : fourstate) return bit is
+    variable newval: bit := '0';
+  begin
+    case x is
+      when '0' => newval := '0';
+      when '1' => newval := '1';
+      when 'z' => newval := '0';
+      when 'x' => newval := '0';
+    end case;
+    return newval;
+  end fourstate_to_bit;
+end c04s03b02x02p12n01i00143pkg;
+
+use work.c04s03b02x02p12n01i00143pkg.all;
+ENTITY c04s03b02x02p12n01i00143ent IS
+  port( x, y: in fourstate);
+END c04s03b02x02p12n01i00143ent;
+
+ARCHITECTURE c04s03b02x02p12n01i00143arch OF c04s03b02x02p12n01i00143ent IS
+  signal yint : bit;
+BEGIN
+
+  simple ( fourstate_to_bit(y) , yint);
+
+  TESTING: PROCESS
+  BEGIN
+    wait for 10 ns;
+    assert NOT( yint = '0' )
+      report "***PASSED TEST: c04s03b02x02p12n01i00143"
+      severity NOTE;
+    assert ( yint = '0' )
+      report "***FAILED TEST: c04s03b02x02p12n01i00143 - Type conversion test failed."
+      severity ERROR;
+    wait;
+  END PROCESS TESTING;
+
+END c04s03b02x02p12n01i00143arch;