<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def html_output(self, checkers_html):
        '''
        Renders the HTML output for multiple tests and returns it as a string.

        @param checkers_html     List of HTML for single tests as returned by
                                 checker_html_output
        '''
        # Note: This relies on checker_html_output having been called so that
        # self.j2 is initialised
        template = self.j2.get_template('ccheck_wrapper.html.j2')
        return template.render(checkers=checkers_html)