.../tests/src/Functional/ContentTranslationPendingRevisionsTest.php     | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/modules/content_translation/tests/src/Functional/ContentTranslationPendingRevisionsTest.php b/core/modules/content_translation/tests/src/Functional/ContentTranslationPendingRevisionsTest.php
index 51810ed..d37c826 100644
--- a/core/modules/content_translation/tests/src/Functional/ContentTranslationPendingRevisionsTest.php
+++ b/core/modules/content_translation/tests/src/Functional/ContentTranslationPendingRevisionsTest.php
@@ -42,6 +42,8 @@ protected function setUp() {
     $entity_type_manager = $this->container->get('entity_type.manager');
     $this->storage = $entity_type_manager->getStorage($this->entityTypeId);
 
+    $this->config('node.settings')->set('use_admin_theme', '1')->save();
+
     // Enable content moderation for the entity type.
     $this->drupalLogin($this->rootUser);
     $workflow_id = 'editorial';