public  void doTest(String jspName) throws Exception 
{
        WebRequest request = new GetMethodWebRequest(jspName);
        WebResponse response = runner.getResponse(request);
        if (log.isDebugEnabled())
        {
            log.debug(response.getText());
        }
        WebTable[] tables = response.getTables();
        assertEquals("Wrong number of tables.", 1, tables.length);
        assertEquals("Wrong content for first column", "", tables[0].getCellAsText(1, 0));
        assertEquals("Wrong content for second column", "", tables[0].getCellAsText(1, 1));
        assertEquals("Wrong content for third column", "null", tables[0].getCellAsText(1, 2));
}

No exception when an invalid page is requested.

 public String getJspName() 
{
        return "DISPL-161.jsp";
}