diff --git a/core/modules/aggregator/aggregator.theme.inc b/core/modules/aggregator/aggregator.theme.inc
index ae78297..52e9a67 100644
--- a/core/modules/aggregator/aggregator.theme.inc
+++ b/core/modules/aggregator/aggregator.theme.inc
@@ -26,7 +26,7 @@ function template_preprocess_aggregator_item(&$variables) {
   }
 
   $variables['url'] = check_url($item->getLink());
-  $variables['title'] = check_plain($item->label());
+  $variables['title'] = String::checkPlain($item->label());
   $variables['attributes']['class'][] = 'feed-item';
 }
 
diff --git a/core/modules/aggregator/config/install/entity.view_display.aggregator_feed.aggregator_feed.summary.yml b/core/modules/aggregator/config/install/entity.view_display.aggregator_feed.aggregator_feed.summary.yml
index 5828855..3097653 100644
--- a/core/modules/aggregator/config/install/entity.view_display.aggregator_feed.aggregator_feed.summary.yml
+++ b/core/modules/aggregator/config/install/entity.view_display.aggregator_feed.aggregator_feed.summary.yml
@@ -14,3 +14,5 @@ status: true
 dependencies:
   entity:
     - entity.view_mode.aggregator_feed.summary
+  module:
+    - aggregator
diff --git a/core/modules/aggregator/config/install/entity.view_display.aggregator_item.aggregator_item.summary.yml b/core/modules/aggregator/config/install/entity.view_display.aggregator_item.aggregator_item.summary.yml
index f02db0d..dcbd77c 100644
--- a/core/modules/aggregator/config/install/entity.view_display.aggregator_item.aggregator_item.summary.yml
+++ b/core/modules/aggregator/config/install/entity.view_display.aggregator_item.aggregator_item.summary.yml
@@ -14,3 +14,5 @@ status: true
 dependencies:
   entity:
     - entity.view_mode.aggregator_item.summary
+  module:
+    - aggregator