function tearDown()
 {
     $GLOBALS['PIECE_ORM_Configured'] = false;
     Piece_ORM_Context::clear();
     $cache =& new Cache_Lite(array('cacheDir' => "{$this->_cacheDirectory}/", 'automaticSerialization' => true, 'errorHandlingAPIBreak' => true));
     $cache->clean();
     Piece_Unity_Context::clear();
 }