diff -u b/core/modules/book/tests/src/Functional/BookTest.php b/core/modules/book/tests/src/Functional/BookTest.php
--- b/core/modules/book/tests/src/Functional/BookTest.php
+++ b/core/modules/book/tests/src/Functional/BookTest.php
@@ -741,7 +741,7 @@
     $this->drupalPlaceBlock('book_navigation', ['block_mode' => 'book pages']);
 
     // Unpublish book node.
-    $edit = array('status[value]' => FALSE);
+    $edit = ['status[value]' => FALSE];
     $this->drupalPostForm('node/' . $this->book->id() . '/edit', $edit, t('Save'));
 
     // Test node page.
diff -u b/core/modules/file/src/Tests/FileFieldWidgetTest.php b/core/modules/file/src/Tests/FileFieldWidgetTest.php
--- b/core/modules/file/src/Tests/FileFieldWidgetTest.php
+++ b/core/modules/file/src/Tests/FileFieldWidgetTest.php
@@ -122,7 +122,7 @@
 
       // Save the node and ensure it does not have the file.
       $this->drupalPostForm(NULL, [], t('Save'));
-      $node_storage->resetCache(array($nid));
+      $node_storage->resetCache([$nid]);
       $node = $node_storage->load($nid);
       $this->assertTrue(empty($node->{$field_name}->target_id), 'File was successfully removed from the node.');
     }
diff -u b/core/modules/node/src/Entity/Node.php b/core/modules/node/src/Entity/Node.php
--- b/core/modules/node/src/Entity/Node.php
+++ b/core/modules/node/src/Entity/Node.php
@@ -406,13 +406,13 @@
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['status']
-      ->setDisplayOptions('form', array(
+      ->setDisplayOptions('form', [
         'type' => 'boolean_checkbox',
-        'settings' => array(
+        'settings' => [
           'display_label' => TRUE,
-        ),
+        ],
         'weight' => 120,
-      ))
+      ])
       ->setDisplayConfigurable('form', TRUE);
 
     $fields['created'] = BaseFieldDefinition::create('created')
diff -u b/core/modules/node/src/Tests/NodeEditFormTest.php b/core/modules/node/src/Tests/NodeEditFormTest.php
--- b/core/modules/node/src/Tests/NodeEditFormTest.php
+++ b/core/modules/node/src/Tests/NodeEditFormTest.php
@@ -134,9 +134,9 @@
     // Edit the same node, save it and verify it's unpublished after unchecking
     // the 'Published' boolean_checkbox and clicking 'Save'.
     $this->drupalGet("node/" . $node->id() . "/edit");
-    $edit = array('status[value]' => FALSE);
+    $edit = ['status[value]' => FALSE];
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->nodeStorage->resetCache(array($node->id()));
+    $this->nodeStorage->resetCache([$node->id()]);
     $node = $this->nodeStorage->load($node->id());
     $this->assertFalse($node->isPublished(), 'Node is unpublished');
   }