title: Cannot require parent directory in phpUnit
body: <p>I have a problem with phpUnit.</p>
  
  <p>Whenever I try to open a file using require (or any other similar function) which is not in the same directory or subdirectory as the test file itself, phpUnit throws this error:</p>
  
  <blockquote>
    <p>Warning: include_once Failed opening "C:\....." for inclusion (include path = '.;C:\xampp\php\PEAR')</p>
  </blockquote>
  
  <p>Can anybody tell me what I am doing wrong? Thank you</p>