reverted:
--- b/core/modules/datetime/tests/modules/datetime_states/src/Forms/StateForm.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains Drupal\datetime_states\StateForm.
- */
-
-namespace Drupal\datetime_states;
-
-use Drupal\Core\Form\FormBase;
-use Drupal\Core\Form\FormStateInterface;
-
-/**
- * Defines a settings page for the File Hosting module.
- */
-class StateForm extends FormBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getFormId() {
-    return "datetime_states_form";
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function buildForm(array $form, FormStateInterface $form_state) {
-    $form['toggle_invisible'] = array(
-      '#type' => 'checkbox',
-      '#title' => $this->t('Invisible'),
-    );
-    $form['toggle_disabled'] = array(
-      '#type' => 'checkbox',
-      '#title' => $this->t('Disabled'),
-    );
-    $form['toggle_required'] = array(
-      '#type' => 'checkbox',
-      '#title' => $this->t('Required'),
-    );
-
-
-    $form['date'] = array(
-      '#type' => 'datetime',
-      '#title' => $this->t('Datetime'),
-      '#description' => $this->t('A datetime form element.'),
-      '#states' => [
-        'invisible' => [
-          ':input[name="toggle_invisible"]' => ['checked' => TRUE],
-        ],
-        'disabled' => [
-          ':input[name="toggle_disabled"]' => ['checked' => TRUE],
-        ],
-        'required' => [
-          ':input[name="toggle_required"]' => ['checked' => TRUE],
-        ],
-      ],
-    );
-
-    return parent::buildForm($form, $form_state);
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function submitForm(array &$form, FormStateInterface $form_state) {
-
-  }
-
-}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/datetime/tests/modules/datetime_states/src/Form/StateForm.php
@@ -0,0 +1,75 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\datetime_states\Form\StateForm.
+ */
+
+namespace Drupal\datetime_states\Form;
+
+use Drupal\Core\Form\FormBase;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Defines a settings page for the File Hosting module.
+ */
+class StateForm extends FormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return "datetime_states_form";
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    $form['toggle_invisible'] = array(
+      '#type' => 'checkbox',
+      '#title' => $this->t('Invisible'),
+    );
+    $form['toggle_disabled'] = array(
+      '#type' => 'checkbox',
+      '#title' => $this->t('Disabled'),
+    );
+    $form['toggle_required'] = array(
+      '#type' => 'checkbox',
+      '#title' => $this->t('Required'),
+    );
+
+
+    $form['date'] = array(
+      '#type' => 'datetime',
+      '#title' => $this->t('Datetime'),
+      '#description' => $this->t('A datetime form element.'),
+      '#states' => [
+        'invisible' => [
+          ':input[name="toggle_invisible"]' => ['checked' => TRUE],
+        ],
+        'disabled' => [
+          ':input[name="toggle_disabled"]' => ['checked' => TRUE],
+        ],
+        'required' => [
+          ':input[name="toggle_required"]' => ['checked' => TRUE],
+        ],
+      ],
+    );
+
+    $form['submit'] = array(
+      '#type' => 'submit',
+      '#value' => $this->t('Save'),
+    );
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+
+  }
+
+}