diff -u b/src/Plugin/Block/MenuBlock.php b/src/Plugin/Block/MenuBlock.php
--- b/src/Plugin/Block/MenuBlock.php
+++ b/src/Plugin/Block/MenuBlock.php
@@ -56,21 +56,21 @@
 
     $form['advanced']['label_type'] = [
       '#type' => 'select',
-      '#title' => 'Use the following as title',
+      '#title' => $this->t("Use the following as title"),
       '#options' => [
-        'block' => $this->t('Block title'),
-        'menu' => $this->t('Menu title'),
-        'active_item' => $this->t('Active item\'s title'),
-        'parent' => $this->t('Active trail\'s parent title'),
-        'root' => $this->t('Active trail\'s root title'),
-        'initial_menu_item' => $this->t('Initial menu item\'s title')
+        'block' => $this->t("Block title"),
+        'menu' => $this->t("Menu title"),
+        'active_item' => $this->t("Active item's title"),
+        'parent' => $this->t("Active trail's parent title"),
+        'root' => $this->t("Active trail's root title"),
+        'initial_menu_item' => $this->t("Initial menu item's title"),
       ],
       '#default_value' => $config['label_type'],
       '#states' => [
         'visible' => [
-          ':input[name="settings[label_display]"]' => ['checked' => TRUE]
-        ]
-      ]
+          ':input[name="settings[label_display]"]' => ['checked' => TRUE],
+        ],
+      ],
     ];
 
     $form['style'] = [
@@ -92,7 +92,7 @@
     ];
 
     // Open the details field sets if their config is not set to defaults.
-    foreach(['menu_levels', 'advanced', 'style'] as $fieldSet) {
+    foreach (['menu_levels', 'advanced', 'style'] as $fieldSet) {
       foreach (array_keys($form[$fieldSet]) as $field) {
         if (isset($defaults[$field]) && $defaults[$field] !== $config[$field]) {
           $form[$fieldSet]['#open'] = TRUE;