diff --git a/css-contain-1/Overview.bs b/css-contain-1/Overview.bs
index 76c477d693f..07bbfbb1423 100644
--- a/css-contain-1/Overview.bs
+++ b/css-contain-1/Overview.bs
@@ -1997,4 +1997,5 @@ quote-scoping-invalidation-002.html
 quote-scoping-invalidation-003.html
 quote-scoping-invalidation-004.html
 quote-scoping-shadow-dom-crash.html
+container-type-important.html
 </wpt>
diff --git a/css-contain-2/Overview.bs b/css-contain-2/Overview.bs
index a6a53778184..fd4a1ed61d7 100644
--- a/css-contain-2/Overview.bs
+++ b/css-contain-2/Overview.bs
@@ -2652,4 +2652,5 @@ container-queries/style-container-invalidation-inheritance.html
 container-queries/style-query-with-unknown-width.html
 contain-inline-size-grid-indefinite-height-min-height-flex-row.html
 contain-inline-size-grid-stretches-auto-rows.html
+container-type-important.html
 </wpt>