Trying to use `request.path` to add in a class if the URL matches a variable

hubl-url-test.html

{% for item in my_topics %}
	{% set blog_topic_url = "/blog/topic/{{item.slug}}" %}
	<li class="{% if request.path == 'blog_topic_url' %}v-active {% endif %} v-tab col s2"><a href="{{ group.absolute_url }}/topic/{{item.slug}}">{{ item }}</a></li>
{% endfor %}