diff --git a/source/_pages/atdc.md b/source/_pages/atdc.md
index 281674258..e88253afc 100644
--- a/source/_pages/atdc.md
+++ b/source/_pages/atdc.md
@@ -13,7 +13,7 @@ Learn to test things like:
 * Whether pages exist.
 * Whether users can view specific pages based on their permissions.
 * Whether certain content is visible on a page given particular circumstances.
-* Refactoring code to test dedicated classes such as Repositories, Actions and Services.
+* Refactoring code to test dedicated classes such as Repositories, Builders, Actions and Services.
 
 {% include 'email-course-form.html.twig' %}
 {% endblock %}