diff -u b/core/modules/system/lib/Drupal/system/Tests/Serialization/EntitySerializationTest.php b/core/modules/system/lib/Drupal/system/Tests/Serialization/EntitySerializationTest.php --- b/core/modules/system/lib/Drupal/system/Tests/Serialization/EntitySerializationTest.php +++ b/core/modules/system/lib/Drupal/system/Tests/Serialization/EntitySerializationTest.php @@ -138,7 +138,7 @@ 'langcode' => '' . LANGUAGE_NOT_SPECIFIED . '', 'default_langcode' => '', 'name' => '' . $this->values['name'] . '', - 'user_id' => '' . $this->values['user_id'] . '', + 'user_id' => '' . $this->values['user_id'] . '', 'field_test_text' => '' . $this->values['field_test_text']['value'] . '' . $this->values['field_test_text']['format'] . '', ); // Sort it in the same order as normalised.