diff --git a/server/views/partials/case-nav.njk b/server/views/partials/case-nav.njk
index d18ee388..faa0ea99 100644
--- a/server/views/partials/case-nav.njk
+++ b/server/views/partials/case-nav.njk
@@ -10,7 +10,7 @@
             href="/case/{{ crn }}">Overview</a>
         </li>
         <li class="moj-sub-navigation__item" data-qa="appointmentsTab">
-          <a class="moj-sub-navigation__link govuk-link--no-visited-state"
+          <a data-ai-id="AppointmentsTab" class="moj-sub-navigation__link govuk-link--no-visited-state"
             {% if currentNavSection == 'appointments' %}
             aria-current="page"
             {% endif %}