diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 5badfa64e7..417b69ced0 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -2087,7 +2087,7 @@ function system_update_8501() {
       $revision_metadata_keys = $installed_entity_type->get('revision_metadata_keys');
       $revision_metadata_keys['revision_default'] = $field_name;
       $installed_entity_type->set('revision_metadata_keys', $revision_metadata_keys);
-      $definition_update_manager->updateEntityType($entity_type);
+      $definition_update_manager->updateEntityType($installed_entity_type);
 
       $storage_definition = BaseFieldDefinition::create('boolean')
         ->setLabel(t('Default revision'))
diff --git a/core/modules/system/tests/src/Functional/Update/EntityUpdateAddRevisionDefaultTest.php b/core/modules/system/tests/src/Functional/Update/EntityUpdateAddRevisionDefaultTest.php
index dcf37c9fb1..e226540b6a 100644
--- a/core/modules/system/tests/src/Functional/Update/EntityUpdateAddRevisionDefaultTest.php
+++ b/core/modules/system/tests/src/Functional/Update/EntityUpdateAddRevisionDefaultTest.php
@@ -12,7 +12,7 @@
  *
  * @group Update
  */
-class EntityUpdateAddRevisionDefault extends UpdatePathTestBase {
+class EntityUpdateAddRevisionDefaultTest extends UpdatePathTestBase {
 
   use EntityDefinitionTestTrait;
   use DbUpdatesTrait;