diff --git a/testing/web-platform/meta/accname/name/comp_name_from_content.html.ini b/testing/web-platform/meta/accname/name/comp_name_from_content.html.ini
index 8bd22312f241..b4bf40e86cc1 100644
--- a/testing/web-platform/meta/accname/name/comp_name_from_content.html.ini
+++ b/testing/web-platform/meta/accname/name/comp_name_from_content.html.ini
@@ -1,3 +1,5 @@
+prefs: [layout.css.content.alt-text.enabled: true]
+
 [comp_name_from_content.html]
   [heading name from content for each child including nested link using aria-labelledby with nested image]
     expected: FAIL