Wordpress comment_form（）问题

I'm trying to 'validate' a WP Theme using the Theme Checker plugin, the problem is that I get the following error:

REQUIRED: Could not find comment_form. See: comment_form <?php comment_form(); ?>

I am using <?php comments_template(); ?> to generate the form, so if I include the <?php comment_form(); ?> it will duplicate the whole inputs for comment form.

This is my comments.php