diff --git a/core/modules/system/tests/modules/test_page_test/src/Form/TestForm.php b/core/modules/system/tests/modules/test_page_test/src/Form/TestForm.php
index d25875b..c619a7d 100644
--- a/core/modules/system/tests/modules/test_page_test/src/Form/TestForm.php
+++ b/core/modules/system/tests/modules/test_page_test/src/Form/TestForm.php
@@ -16,7 +16,7 @@ class TestForm extends FormBase {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $form['test_table'] = [
       '#type' => 'table',
-      '#header' => array('Column 1', 'Column 2', 'Column 3'),
+      '#header' => ['Column 1', 'Column 2', 'Column 3'],
       'row_1' => [
         'col_1' => ['#plain_text' => 'foo'],
         'col_2' => ['#plain_text' => 'bar'],