diff --git c/core/modules/system/tests/modules/form_test/form_test.module w/core/modules/system/tests/modules/form_test/form_test.module
index 3895379..161fedd 100644
--- c/core/modules/system/tests/modules/form_test/form_test.module
+++ w/core/modules/system/tests/modules/form_test/form_test.module
@@ -214,14 +214,6 @@ function form_test_menu() {
     'access callback' => TRUE,
   );
 
-  $items['form-test/input-forgery-old'] = array(
-    'title' => t('Form test'),
-    'page callback' => 'drupal_get_form',
-    'page arguments' => array('_form_test_input_forgery'),
-    'access callback' => TRUE,
-    'type' => MENU_CALLBACK,
-  );
-
   $items['form-test/form-rebuild-preserve-values'] = array(
     'title' => 'Form values preservation during rebuild test',
     'page callback' => 'drupal_get_form',
@@ -352,7 +344,6 @@ function form_test_menu() {
   return $items;
 }
 
-
 /**
  * Implements hook_permission().
  */
@@ -1132,75 +1123,6 @@ function form_test_form_state_values_clean_advanced_form_submit($form, &$form_st
 }
 
 /**
- * Build a form to test a checkbox.
- */
-function _form_test_checkbox($form, &$form_state) {
-  $form['#submit'] = array('_form_test_submit_values_json');
-
-  // A required checkbox.
-  $form['required_checkbox'] = array(
-    '#type' => 'checkbox',
-    '#required' => TRUE,
-    '#title' => 'required_checkbox',
-  );
-
-  // A disabled checkbox should get its default value back.
-  $form['disabled_checkbox_on'] = array(
-    '#type' => 'checkbox',
-    '#disabled' => TRUE,
-    '#return_value' => 'disabled_checkbox_on',
-    '#default_value' => 'disabled_checkbox_on',
-    '#title' => 'disabled_checkbox_on',
-  );
-  $form['disabled_checkbox_off'] = array(
-    '#type' => 'checkbox',
-    '#disabled' => TRUE,
-    '#return_value' => 'disabled_checkbox_off',
-    '#default_value' => NULL,
-    '#title' => 'disabled_checkbox_off',
-  );
-
-  // A checkbox is active when #default_value == #return_value.
-  $form['checkbox_on'] = array(
-    '#type' => 'checkbox',
-    '#return_value' => 'checkbox_on',
-    '#default_value' => 'checkbox_on',
-    '#title' => 'checkbox_on',
-  );
-
-  // But inactive in any other case.
-  $form['checkbox_off'] = array(
-    '#type' => 'checkbox',
-    '#return_value' => 'checkbox_off',
-    '#default_value' => 'checkbox_on',
-    '#title' => 'checkbox_off',
-  );
-
-  // Checkboxes with a #return_value of '0' are supported.
-  $form['zero_checkbox_on'] = array(
-    '#type' => 'checkbox',
-    '#return_value' => '0',
-    '#default_value' => '0',
-    '#title' => 'zero_checkbox_on',
-  );
-
-  // In that case, passing a #default_value != '0' means that the checkbox is off.
-  $form['zero_checkbox_off'] = array(
-    '#type' => 'checkbox',
-    '#return_value' => '0',
-    '#default_value' => '1',
-    '#title' => 'zero_checkbox_off',
-  );
-
-  $form['submit'] = array(
-    '#type' => 'submit',
-    '#value' => t('Submit')
-  );
-
-  return $form;
-}
-
-/**
  * Builds a form to test #type 'select' validation.
  */
 function form_test_select($form, &$form_state) {
@@ -1685,227 +1607,6 @@ function form_test_url($form, &$form_state) {
 }
 
 /**
- * Build a form to test disabled elements.
- */
-function _form_test_disabled_elements($form, &$form_state) {
-  $form['#submit'] = array('_form_test_submit_values_json');
-
-  // Elements that take a simple default value.
-  foreach (array('textfield', 'textarea', 'search', 'tel', 'hidden') as $type) {
-    $form[$type] = array(
-      '#type' => $type,
-      '#title' => $type,
-      '#default_value' => $type,
-      '#test_hijack_value' => 'HIJACK',
-      '#disabled' => TRUE,
-    );
-  }
-
-  // Multiple values option elements.
-  foreach (array('checkboxes', 'select') as $type) {
-    $form[$type . '_multiple'] = array(
-      '#type' => $type,
-      '#title' => $type . ' (multiple)',
-      '#options' => array(
-        'test_1' => 'Test 1',
-        'test_2' => 'Test 2',
-      ),
-      '#multiple' => TRUE,
-      '#default_value' => array('test_2' => 'test_2'),
-      // The keys of #test_hijack_value need to match the #name of the control.
-      // @see FormsTestCase::testDisabledElements()
-      '#test_hijack_value' => $type == 'select' ? array('' => 'test_1') : array('test_1' => 'test_1'),
-      '#disabled' => TRUE,
-    );
-  }
-
-  // Single values option elements.
-  foreach (array('radios', 'select') as $type) {
-    $form[$type . '_single'] = array(
-      '#type' => $type,
-      '#title' => $type . ' (single)',
-      '#options' => array(
-        'test_1' => 'Test 1',
-        'test_2' => 'Test 2',
-      ),
-      '#multiple' => FALSE,
-      '#default_value' => 'test_2',
-      '#test_hijack_value' => 'test_1',
-      '#disabled' => TRUE,
-    );
-  }
-
-  // Checkbox and radio.
-  foreach (array('checkbox', 'radio') as $type) {
-    $form[$type . '_unchecked'] = array(
-      '#type' => $type,
-      '#title' => $type . ' (unchecked)',
-      '#return_value' => 1,
-      '#default_value' => 0,
-      '#test_hijack_value' => 1,
-      '#disabled' => TRUE,
-    );
-    $form[$type . '_checked'] = array(
-      '#type' => $type,
-      '#title' => $type . ' (checked)',
-      '#return_value' => 1,
-      '#default_value' => 1,
-      '#test_hijack_value' => NULL,
-      '#disabled' => TRUE,
-    );
-  }
-
-  // Weight, number, range.
-  foreach (array('weight', 'number', 'range') as $type) {
-    $form[$type] = array(
-      '#type' => $type,
-      '#title' => $type,
-      '#default_value' => 10,
-      '#test_hijack_value' => 5,
-      '#disabled' => TRUE,
-    );
-  }
-
-  // Color.
-  $form['color'] = array(
-    '#type' => 'color',
-    '#title' => 'color',
-    '#default_value' => '#0000ff',
-    '#test_hijack_value' => '#ff0000',
-    '#disabled' => TRUE,
-  );
-
-  // The #disabled state should propagate to children.
-  $form['disabled_container'] = array(
-    '#disabled' => TRUE,
-  );
-  foreach (array('textfield', 'textarea', 'hidden', 'tel', 'url') as $type) {
-    $form['disabled_container']['disabled_container_' . $type] = array(
-      '#type' => $type,
-      '#title' => $type,
-      '#default_value' => $type,
-      '#test_hijack_value' => 'HIJACK',
-    );
-  }
-
-  // Date.
-  $date = new DrupalDateTime('1978-11-01 10:30:00', 'Europe/Berlin');
-  $expected = array('date' => '1978-11-01 10:30:00', 'timezone_type' => 3, 'timezone' => 'Europe/Berlin',);
-  $form['disabled_container']['disabled_container_datetime'] = array(
-    '#type' => 'datetime',
-    '#title' => 'datetime',
-    '#default_value' => $date,
-    '#expected_value' => $expected,
-    '#test_hijack_value' => new DrupalDateTime('1978-12-02 11:30:00', 'Europe/Berlin'),
-    '#date_timezone' => 'Europe/Berlin',
-  );
-
-
-  // Try to hijack the email field with a valid email.
-  $form['disabled_container']['disabled_container_email'] = array(
-    '#type' => 'email',
-    '#title' => 'email',
-    '#default_value' => 'foo@example.com',
-    '#test_hijack_value' => 'bar@example.com',
-  );
-
-  // Try to hijack the URL field with a valid URL.
-  $form['disabled_container']['disabled_container_url'] = array(
-    '#type' => 'url',
-    '#title' => 'url',
-    '#default_value' => 'http://example.com',
-    '#test_hijack_value' => 'http://example.com/foo',
-  );
-
-  // Text format.
-  $form['text_format'] = array(
-    '#type' => 'text_format',
-    '#title' => 'Text format',
-    '#disabled' => TRUE,
-    '#default_value' => 'Text value',
-    '#format' => 'plain_text',
-    '#expected_value' => array(
-      'value' => 'Text value',
-      'format' => 'plain_text',
-    ),
-    '#test_hijack_value' => array(
-      'value' => 'HIJACK',
-      'format' => 'filtered_html',
-    ),
-  );
-
-  // Password fields.
-  $form['password'] = array(
-    '#type' => 'password',
-    '#title' => 'Password',
-    '#disabled' => TRUE,
-  );
-  $form['password_confirm'] = array(
-    '#type' => 'password_confirm',
-    '#title' => 'Password confirm',
-    '#disabled' => TRUE,
-  );
-
-  // Files.
-  $form['file'] = array(
-    '#type' => 'file',
-    '#title' => 'File',
-    '#disabled' => TRUE,
-  );
-  $form['managed_file'] = array(
-    '#type' => 'managed_file',
-    '#title' => 'Managed file',
-    '#disabled' => TRUE,
-  );
-
-  // Buttons.
-  $form['image_button'] = array(
-    '#type' => 'image_button',
-    '#value' => 'Image button',
-    '#disabled' => TRUE,
-  );
-  $form['button'] = array(
-    '#type' => 'button',
-    '#value' => 'Button',
-    '#disabled' => TRUE,
-  );
-  $form['submit_disabled'] = array(
-    '#type' => 'submit',
-    '#value' => 'Submit',
-    '#disabled' => TRUE,
-  );
-
-  $form['submit'] = array(
-    '#type' => 'submit',
-    '#value' => t('Submit'),
-  );
-
-  return $form;
-}
-
-/**
- * Build a form to test input forgery of enabled elements.
- */
-function _form_test_input_forgery($form, &$form_state) {
-  $form['#submit'] = array('_form_test_submit_values_json');
-
-  // For testing that a user can't submit a value not matching one of the
-  // allowed options.
-  $form['checkboxes'] = array(
-    '#type' => 'checkboxes',
-    '#options' => array(
-      'one' => 'One',
-      'two' => 'Two',
-    ),
-  );
-  $form['submit'] = array(
-    '#type' => 'submit',
-    '#value' => t('Submit'),
-  );
-  return $form;
-}
-
-/**
  * Form builder for testing preservation of values during a rebuild.
  */
 function form_test_form_rebuild_preserve_values_form($form, &$form_state) {
diff --git c/core/modules/system/tests/modules/form_test/form_test.routing.yml w/core/modules/system/tests/modules/form_test/form_test.routing.yml
index 17dc131..80812cf 100644
--- c/core/modules/system/tests/modules/form_test/form_test.routing.yml
+++ w/core/modules/system/tests/modules/form_test/form_test.routing.yml
@@ -72,6 +72,7 @@ form_test.checkbox:
   pattern: '/form-test/checkbox'
   defaults:
     _form: '\Drupal\form_test\FormTestCheckboxForm'
+    _title: 'Form test'
   requirements:
     _access: 'TRUE'
 
@@ -79,6 +80,7 @@ form_test.disabled_elements:
   pattern: '/form-test/disabled-elements'
   defaults:
     _form: '\Drupal\form_test\FormTestDisabledElementsForm'
+    _title: 'Form test'
   requirements:
     _access: 'TRUE'
 
@@ -86,5 +88,6 @@ form_test.input_forgery:
   pattern: '/form-test/input-forgery'
   defaults:
     _form: '\Drupal\form_test\FormTestInputForgery'
+    _title: 'Form test'
   requirements:
     _access: 'TRUE'