tbt-widget-output-template.twig

<li class="testimonial">
    <div class="testimonial-gravatar">{{ gravatar }}</div>
    <div class="testimonial-data">
        <p class="testimonial-content">{{ testimonial_excerpt }}</p>
        <p class="testimonial-author">{{ author_prefix }}{{ author }}</p>
        {% if  company_url %}
            <p class="testimonial-company"><a href="{{ company_url }}">{{ company_name }}</a></p>
        {% endif %}
    </div>
    <div class="clear"></div>
</li>