diff --git a/mkdocs.yml b/mkdocs.yml
index ec74385e82..b17149ce15 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -38,6 +38,7 @@ theme:
         - "search.suggest"
         - "content.code.copy"
         - "content.tabs.link"
+        - "navigation.instant"
         - "navigation.path"
 extra_css:
     - "stylesheets/fonts.css"
diff --git a/theme/main.html b/theme/main.html
index 8011eabbb9..3bff75c54f 100644
--- a/theme/main.html
+++ b/theme/main.html
@@ -5,6 +5,12 @@
   <link rel="preload" href="{{ 'assets/fonts/inter-latin.woff2' | url }}" as="font" type="font/woff2" crossorigin>
 {% endblock %}
 
+{% block extrahead %}
+  {{ super() }}
+  {# TEST-ONLY (do not merge): exercise CookieYes under navigation.instant #}
+  {% include "partials/integrations/cookieyes.html" %}
+{% endblock %}
+
 {% block site_meta %}
   {{ super() }}
   {% if page and page.meta and page.meta.git_revision_date_localized_raw_iso_datetime %}
diff --git a/theme/partials/integrations/cookieyes.html b/theme/partials/integrations/cookieyes.html
new file mode 100644
index 0000000000..044f71d539
--- /dev/null
+++ b/theme/partials/integrations/cookieyes.html
@@ -0,0 +1,7 @@
+{# TEST-ONLY: reproduce navigation.instant + CookieYes interaction on a Netlify
+   preview. Uses the CookieYes *staging site* key registered for this preview
+   host (banner enabled + auto-blocking), NOT the production key that GTM
+   injects on docs.codacy.com. Do NOT merge this to master. #}
+<!-- Start cookieyes banner -->
+<script id="cookieyes" type="text/javascript" src="ttps://cdn-cookieyes.com/client_data/c5874f8d39a04e1ffb9c4b1c8b3074e9/script.js"></script> 
+<!-- End cookieyes banner -->