diff -u b/core/modules/taxonomy/tests/src/Functional/TermIndexTest.php b/core/modules/taxonomy/tests/src/Functional/TermIndexTest.php
--- b/core/modules/taxonomy/tests/src/Functional/TermIndexTest.php
+++ b/core/modules/taxonomy/tests/src/Functional/TermIndexTest.php
@@ -62,7 +62,7 @@
     $handler_settings = [
       'target_bundles' => [
         $this->vocabulary->id() => $this->vocabulary->id(),
-      ],
+       ],
       'auto_create' => TRUE,
     ];
     $this->createEntityReferenceField('node', 'article', $this->fieldName1, NULL, 'taxonomy_term', 'default', $handler_settings, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);