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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc3156.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc3156.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: tc3156.vhd,v 1.2 2001-10-26 16:29:52 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c05s03b00x00p01n01i03156ent IS
+END c05s03b00x00p01n01i03156ent;
+
+ARCHITECTURE c05s03b00x00p01n01i03156arch OF c05s03b00x00p01n01i03156ent IS
+
+begin
+--Enclose the whole schematic in a block.
+  L : block
+    -- Define resolution function for SIG:
+    function RESFUNC( S : BIT_VECTOR ) return BIT is
+    begin
+      for I in S'RANGE loop
+        if (S(I) = '1') then
+          return '1';
+        end if;
+      end loop;
+      return '0';
+    end RESFUNC;
+    
+    -- Define the signal.
+    subtype    RBIT    is RESFUNC BIT;
+    signal       SIG    : RBIT bus;
+    
+    -- Define the disconnect specification.
+    disconnect    SIG    : RBIT after 0 ns;
+    
+    -- Define the GUARD signal.
+    signal    GUARD    : BOOLEAN := FALSE;
+  BEGIN
+    -- Define the guarded signal assignment.
+    L1: block( GUARD = TRUE )
+    begin
+      SIG <= guarded '1';
+    end block L1;
+
+    TESTING: PROCESS
+      variable    pass : integer := 0;
+    BEGIN
+
+      -- 1. Turn on the GUARD, verify that SIG gets toggled.
+      GUARD <= TRUE;
+      wait on SIG;
+      assert( SIG = '1' );
+      if ( SIG = '1' ) then
+        pass := pass + 1;
+      end if;
+      
+      -- 2. Turn off the GUARD, verify that SIG gets turned OFF.
+      GUARD <= FALSE;
+      wait on SIG;
+      assert( SIG = '0' );
+      if ( SIG = '0' ) then
+        pass := pass + 1;
+      end if;
+
+      wait for 50 ns; 
+      assert NOT( pass = 2 )
+        report "***PASSED TEST: c05s03b00x00p01n01i03156"
+        severity NOTE;
+      assert ( pass = 2 )
+        report "***FAILED TEST: c05s03b00x00p01n01i03156 - Disconnect in block statement does not work properly."
+        severity ERROR;
+      wait;
+    END PROCESS TESTING;
+  end block L;
+
+END c05s03b00x00p01n01i03156arch;