diff --git a/core/modules/views/src/Plugin/views/PluginBase.php b/core/modules/views/src/Plugin/views/PluginBase.php
index 4204c61..c2d9f0f 100644
--- a/core/modules/views/src/Plugin/views/PluginBase.php
+++ b/core/modules/views/src/Plugin/views/PluginBase.php
@@ -15,7 +15,6 @@
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Plugin\PluginBase as ComponentPluginBase;
 use Drupal\Core\Render\Element;
-use Drupal\Core\Render\RenderContext;
 use Drupal\views\Plugin\views\display\DisplayPluginBase;
 use Drupal\views\ViewExecutable;
 use Symfony\Component\DependencyInjection\ContainerInterface;
diff --git a/core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php b/core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php
index 96c8aea..de1818d 100644
--- a/core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php
+++ b/core/modules/views/src/Plugin/views/argument/ArgumentPluginBase.php
@@ -250,7 +250,6 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       '#title_display' => 'invisible',
       '#default_value' => $this->options['title'],
       '#description' => $this->t('Override the view and other argument titles. You may use Twig syntax in this field.'),
-      // @todo: Need to show available tokens.
       '#states' => array(
         'visible' => array(
           ':input[name="options[title_enable]"]' => array('checked' => TRUE),
@@ -259,6 +258,23 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       '#fieldset' => 'argument_present',
     );
 
+    $output = $this->getTokenHelp();
+    $form['token_help'] = [
+      '#type' => 'details',
+      '#title' => $this->t('Replacement patterns'),
+      '#value' => $output,
+      '#states' => [
+        'visible' => [
+          [
+            ':input[name="options[title_enable]"]' => ['checked' => TRUE],
+          ],
+          [
+            ':input[name="options[exception][title_enable]"]' => ['checked' => TRUE],
+          ],
+        ],
+      ],
+    ];
+
     $form['specify_validation'] = array(
       '#type' => 'checkbox',
       '#title' => $this->t('Specify validation criteria'),
@@ -349,6 +365,46 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     );
   }
 
+  /**
+   * Provide token help information for the argument.
+   *
+   * @return array
+   *   A render array.
+   */
+  protected function getTokenHelp() {
+    $output = [];
+
+    foreach ($this->view->display_handler->getHandlers('argument') as $arg => $handler) {
+      /** @var \Drupal\views\Plugin\views\argument\ArgumentPluginBase $handler */
+      $options[t('Arguments')]["{{ arguments.$arg }}"] = $this->t('@argument title', array('@argument' => $handler->adminLabel()));
+      $options[t('Arguments')]["{{ raw_arguments.$arg }}"] = $this->t('@argument input', array('@argument' => $handler->adminLabel()));
+    }
+
+    // We have some options, so make a list.
+    if (!empty($options)) {
+      $output[] = [
+        '#markup' => '<p>' . $this->t("The following replacement tokens are available for this argument.") . '</p>',
+      ];
+      foreach (array_keys($options) as $type) {
+        if (!empty($options[$type])) {
+          $items = array();
+          foreach ($options[$type] as $key => $value) {
+            $items[] = $key . ' == ' . $value;
+          }
+          $item_list = array(
+            '#theme' => 'item_list',
+            '#items' => $items,
+            '#list_type' => $type,
+          );
+          $output[] = $item_list;
+        }
+      }
+    }
+
+    return $output;
+  }
+
+
   public function validateOptionsForm(&$form, FormStateInterface $form_state) {
     $option_values = &$form_state->getValue('options');
     if (empty($option_values)) {
diff --git a/core/modules/views/src/Tests/Update/ArgumentPlaceholderUpdatePathTest.php b/core/modules/views/src/Tests/Update/ArgumentPlaceholderUpdatePathTest.php
index 269844f..d123b5d 100644
--- a/core/modules/views/src/Tests/Update/ArgumentPlaceholderUpdatePathTest.php
+++ b/core/modules/views/src/Tests/Update/ArgumentPlaceholderUpdatePathTest.php
@@ -13,6 +13,8 @@
 /**
  * Tests the argument placeholder update path.
  *
+ * @see views_update_8002()
+ *
  * @group views
  */
 class ArgumentPlaceholderUpdatePathTest extends UpdatePathTestBase {
@@ -27,6 +29,9 @@ protected function setDatabaseDumpFiles() {
     ];
   }
 
+  /**
+   * Ensures that %1 and !1 are converted to twig tokens in existing views.
+   */
   public function testArgumentPlaceholderUpdate() {
     $this->runUpdates();
     $view = View::load('test_token_view');
diff --git a/core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php b/core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php
index 704e94c..65471b7 100644
--- a/core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php
+++ b/core/modules/views/tests/src/Unit/Plugin/field/FieldPluginBaseTest.php
@@ -497,6 +497,67 @@ protected function setupTestField(array $options = []) {
     return $field;
   }
 
+  /**
+   * @covers ::getRenderTokens
+   */
+  public function testGetRenderTokensWithoutFieldsAndArguments() {
+    $field = $this->setupTestField();
+
+    $this->display->expects($this->any())
+      ->method('getHandlers')
+      ->willReturnMap([
+        ['argument', []],
+        ['field', []],
+      ]);
+
+    $this->assertEquals([], $field->getRenderTokens([]));
+  }
+
+  /**
+   * @covers ::getRenderTokens
+   */
+  public function testGetRenderTokensWithoutArguments() {
+    $field = $this->setupTestField(['id' => 'id']);
+
+    $field->last_render = 'last rendered output';
+    $this->display->expects($this->any())
+      ->method('getHandlers')
+      ->willReturnMap([
+        ['argument', []],
+        ['field', ['id' => $field]],
+      ]);
+
+    $this->assertEquals(['{{ id }}' => 'last rendered output'], $field->getRenderTokens([]));
+  }
+
+  /**
+   * @covers ::getRenderTokens
+   */
+  public function testGetRenderTokensWithArguments() {
+    $field = $this->setupTestField(['id' => 'id']);
+    $field->view->args = ['argument value'];
+    $field->view->build_info['substitutions']['{{ arguments.name }}'] = 'argument value';
+
+    $argument = $this->getMockBuilder('\Drupal\views\Plugin\views\argument\ArgumentPluginBase')
+      ->disableOriginalConstructor()
+      ->getMock();
+
+    $field->last_render = 'last rendered output';
+    $this->display->expects($this->any())
+      ->method('getHandlers')
+      ->willReturnMap([
+        ['argument', ['name' => $argument]],
+        ['field', ['id' => $field]],
+      ]);
+
+    $expected = [
+      '{{ id }}' => 'last rendered output',
+      '{{ arguments.name }}' => 'argument value',
+      '{{ raw_arguments.name }}' => 'argument value',
+    ];
+    $this->assertEquals($expected, $field->getRenderTokens([]));
+  }
+
 }
 
 class FieldPluginBaseTestField extends FieldPluginBase {