reverted:
--- b/core/modules/media/config/optional/system.action.media_delete_action.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  module:
-    - media
-id: media_delete_action
-label: 'Delete media'
-type: media
-plugin: media_delete_action
-configuration: {  }
reverted:
--- b/core/modules/media/config/optional/system.action.media_publish_action.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  module:
-    - media
-id: media_publish_action
-label: 'Publish media'
-type: media
-plugin: media_publish_action
-configuration: {  }
reverted:
--- b/core/modules/media/config/optional/system.action.media_save_action.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  module:
-    - media
-id: media_save_action
-label: 'Save media'
-type: media
-plugin: media_save_action
-configuration: {  }
reverted:
--- b/core/modules/media/config/optional/system.action.media_unpublish_action.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-langcode: en
-status: true
-dependencies:
-  module:
-    - media
-id: media_unpublish_action
-label: 'Unpublish media'
-type: media
-plugin: media_unpublish_action
-configuration: {  }
diff -u b/core/modules/media/config/schema/media.schema.yml b/core/modules/media/config/schema/media.schema.yml
--- b/core/modules/media/config/schema/media.schema.yml
+++ b/core/modules/media/config/schema/media.schema.yml
@@ -36,22 +36,6 @@
       sequence:
         type: string
 
-action.configuration.media_delete_action:
-  type: action_configuration_default
-  label: 'Delete media configuration'
-
-action.configuration.media_save_action:
-  type: action_configuration_default
-  label: 'Save media configuration'
-
-action.configuration.media_publish_action:
-  type: action_configuration_default
-  label: 'Publish media configuration'
-
-action.configuration.media_unpublish_action:
-  type: action_configuration_default
-  label: 'Unpublish media configuration'
-
 field.formatter.settings.media_thumbnail:
   type: field.formatter.settings.image
   label: 'Media thumbnail field display format settings'
reverted:
--- b/core/modules/media/media.tokens.inc
+++ /dev/null
@@ -1,175 +0,0 @@
-<?php
-
-/**
- * @file
- * Builds placeholder replacement tokens for media-related data.
- */
-
-use Drupal\Core\Datetime\Entity\DateFormat;
-use Drupal\Core\Language\LanguageInterface;
-use Drupal\Core\Render\BubbleableMetadata;
-
-/**
- * Implements hook_token_info().
- */
-function media_token_info() {
-  $type = [
-    'name' => t('Media'),
-    'description' => t('Tokens related to individual media items.'),
-    'needs-data' => 'media',
-  ];
-
-  // Core tokens for media.
-  $media['mid'] = [
-    'name' => t('Media ID'),
-    'description' => t('The unique ID of the media item.'),
-  ];
-  $media['uuid'] = [
-    'name' => t('Media UUID'),
-    'description' => t('The unique UUID of the media item.'),
-  ];
-  $media['vid'] = [
-    'name' => t('Revision ID'),
-    'description' => t("The unique ID of the media item's latest revision."),
-  ];
-  $media['bundle'] = [
-    'name' => t('Media type'),
-  ];
-  $media['bundle-name'] = [
-    'name' => t('Media type name'),
-    'description' => t('The human-readable name of the media type.'),
-  ];
-  $media['langcode'] = [
-    'name' => t('Language code'),
-    'description' => t('The language code of the language the media item is written in.'),
-  ];
-  $media['name'] = [
-    'name' => t('Name'),
-    'description' => t('The name of this media item.'),
-  ];
-  $media['author'] = [
-    'name' => t('Author'),
-    'type' => 'user',
-  ];
-  $media['url'] = [
-    'name' => t('URL'),
-    'description' => t('The URL of the media item.'),
-  ];
-  $media['edit-url'] = [
-    'name' => t('Edit URL'),
-    'description' => t("The URL of the media item's edit page."),
-  ];
-
-  // Chained tokens for media.
-  $media['created'] = [
-    'name' => t('Date created'),
-    'type' => 'date',
-  ];
-  $media['changed'] = [
-    'name' => t('Date changed'),
-    'description' => t('The date the media item was most recently updated.'),
-    'type' => 'date',
-  ];
-
-  return [
-    'types' => ['media' => $type],
-    'tokens' => ['media' => $media],
-  ];
-}
-
-/**
- * Implements hook_tokens().
- */
-function media_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
-  $token_service = \Drupal::token();
-
-  $url_options = ['absolute' => TRUE];
-  if (isset($options['langcode'])) {
-    $url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
-    $langcode = $options['langcode'];
-  }
-  else {
-    $langcode = LanguageInterface::LANGCODE_DEFAULT;
-  }
-
-  $replacements = [];
-  if ($type === 'media' && !empty($data['media'])) {
-    /** @var \Drupal\media\MediaInterface $media */
-    $media = \Drupal::service('entity.repository')->getTranslationFromContext($data['media'], $langcode, ['operation' => 'media_entity_tokens']);
-
-    foreach ($tokens as $name => $original) {
-      switch ($name) {
-        // Simple key values on the media_entity.
-        case 'mid':
-          $replacements[$original] = $media->id();
-          break;
-
-        case 'uuid':
-          $replacements[$original] = $media->uuid();
-          break;
-
-        case 'vid':
-          $replacements[$original] = $media->getRevisionId();
-          break;
-
-        case 'bundle':
-          $replacements[$original] = $media->bundle();
-          break;
-
-        case 'bundle-name':
-          $replacements[$original] = $media->bundle->entity->label();
-          break;
-
-        case 'langcode':
-          $replacements[$original] = $media->language()->getId();
-          break;
-
-        case 'name':
-          $replacements[$original] = $media->label();
-          break;
-
-        case 'url':
-          $replacements[$original] = $media->toUrl('canonical', $url_options);
-          break;
-
-        case 'edit-url':
-          $replacements[$original] = $media->toUrl('edit-form', $url_options);
-          break;
-
-        // Default values for the chained tokens handled below.
-        case 'author':
-          $account = $media->getOwner();
-          $bubbleable_metadata->addCacheableDependency($account);
-          $replacements[$original] = $account->label();
-          break;
-
-        case 'created':
-          $date_format = DateFormat::load('medium');
-          $bubbleable_metadata->addCacheableDependency($date_format);
-          $replacements[$original] = \Drupal::service('date.formatter')->format($media->getCreatedTime(), $date_format->id(), '', NULL, $langcode);
-          break;
-
-        case 'changed':
-          $date_format = DateFormat::load('medium');
-          $bubbleable_metadata->addCacheableDependency($date_format);
-          $replacements[$original] = \Drupal::service('date.formatter')->format($media->getChangedTime(), $date_format->id(), '', NULL, $langcode);
-          break;
-      }
-    }
-
-    if ($author_tokens = $token_service->findWithPrefix($tokens, 'author')) {
-      $account = $media->get('uid')->entity;
-      $replacements += $token_service->generate('user', $author_tokens, ['user' => $account], $options, $bubbleable_metadata);
-    }
-
-    if ($created_tokens = $token_service->findWithPrefix($tokens, 'created')) {
-      $replacements += $token_service->generate('date', $created_tokens, ['date' => $media->getCreatedTime()], $options, $bubbleable_metadata);
-    }
-
-    if ($changed_tokens = $token_service->findWithPrefix($tokens, 'changed')) {
-      $replacements += $token_service->generate('date', $changed_tokens, ['date' => $media->getChangedTime()], $options, $bubbleable_metadata);
-    }
-  }
-
-  return $replacements;
-}
diff -u b/core/modules/media/src/Entity/Media.php b/core/modules/media/src/Entity/Media.php
--- b/core/modules/media/src/Entity/Media.php
+++ b/core/modules/media/src/Entity/Media.php
@@ -145,6 +145,12 @@
    *
    * @return \Drupal\media\MediaInterface
    *   The updated media item.
+   *
+   * @internal
+   *
+   * @todo There has been some disagreement about how to handle updates to
+   *   thumbnails. We need to decide on what the API will be for this.
+   *   https://www.drupal.org/node/2878119
    */
   protected function updateThumbnail($from_queue = FALSE) {
     $file_storage = \Drupal::service('entity_type.manager')->getStorage('file');
@@ -205,18 +211,20 @@
   }
 
   /**
-   * Gets a file URI for a media item.
+   * Gets the URI for the thumbnail of a media item.
    *
-   * If thumbnail fetching should be queued then temporary use default
-   * thumbnail for new files or temporary keep existing thumbnail for
-   * updates.
-   * Immediately fetch a new thumbnail from the media source otherwise.
+   * If thumbnail fetching is queued, new media items will use the default
+   * thumbnail, and existing media items will use the current thumbnail, until
+   * the queue is processed and the updated thumbnail has been fetched.
+   * Otherwise, the new thumbnail will be fetched immediately.
    *
    * @param bool $from_queue
    *   Specifies whether the thumbnail is being fetched from the queue.
    *
-   * @return \Drupal\media\MediaInterface
+   * @return string
    *   The file URI for the thumbnail of the media item.
+   *
+   * @internal
    */
   protected function getThumbnailUri($from_queue) {
     $thumbnails_queued = $this->bundle->entity->thumbnailDownloadsAreQueued();
@@ -239,8 +247,10 @@
    *
    * @return bool
    *   TRUE if the source field value changed, FALSE otherwise.
+   *
+   * @internal
    */
-  protected function sourceFieldChanged() {
+  protected function hasSourceFieldChanged() {
     $source_field_name = $this->getSource()->getConfiguration()['source_field'];
     $current_value = $this->get($source_field_name)->getValue();
     return (isset($this->original) && $current_value != $this->original->get($source_field_name)->getValue());
@@ -258,21 +268,16 @@
   protected function shouldUpdateThumbnail($is_new = FALSE) {
     // Update thumbnail if we don't have a thumbnail yet or when the source
     // field value changes.
-    return !$this->get('thumbnail')->entity || $is_new || $this->sourceFieldChanged();
+    return !$this->get('thumbnail')->entity || $is_new || $this->hasSourceFieldChanged();
   }
 
   /**
    * {@inheritdoc}
    */
   public function preSave(EntityStorageInterface $storage) {
-    // If the source plugin defines any constraints we enforce the validation.
-    $media_source = $this->getSource();
-    if ($media_source instanceof MediaSourceEntityConstraintsInterface || $media_source instanceof MediaSourceFieldConstraintsInterface) {
-      $this->setValidationRequired(TRUE);
-    }
-
     parent::preSave($storage);
 
+    $media_source = $this->getSource();
     foreach ($this->translations as $langcode => $data) {
       if ($this->hasTranslation($langcode)) {
         $translation = $this->getTranslation($langcode);
@@ -281,7 +286,7 @@
         foreach ($translation->bundle->entity->getFieldMap() as $metadata_attribute_name => $entity_field_name) {
           // Only save value in entity field if empty. Do not overwrite existing
           // data.
-          if ($translation->hasField($entity_field_name) && ($translation->get($entity_field_name)->isEmpty() || $translation->sourceFieldChanged())) {
+          if ($translation->hasField($entity_field_name) && ($translation->get($entity_field_name)->isEmpty() || $translation->hasSourceFieldChanged())) {
             $translation->set($entity_field_name, $media_source->getMetadata($translation, $metadata_attribute_name));
           }
         }
diff -u b/core/modules/media/src/MediaAccessControlHandler.php b/core/modules/media/src/MediaAccessControlHandler.php
--- b/core/modules/media/src/MediaAccessControlHandler.php
+++ b/core/modules/media/src/MediaAccessControlHandler.php
@@ -54,7 +54,7 @@
    * {@inheritdoc}
    */
   protected function checkCreateAccess(AccountInterface $account, array $context, $entity_bundle = NULL) {
-    return AccessResult::allowedIfHasPermission($account, 'create media');
+    return AccessResult::allowedIfHasPermissions($account, ['administer media', 'create media'], 'OR');
   }
 
 }
reverted:
--- b/core/modules/media/src/Plugin/Action/DeleteMedia.php
+++ /dev/null
@@ -1,98 +0,0 @@
-<?php
-
-namespace Drupal\media\Plugin\Action;
-
-use Drupal\Core\Action\ActionBase;
-use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
-use Drupal\Core\Session\AccountInterface;
-use Drupal\user\PrivateTempStoreFactory;
-use Symfony\Component\DependencyInjection\ContainerInterface;
-
-/**
- * Redirects to a media item deletion form.
- *
- * @Action(
- *   id = "media_delete_action",
- *   label = @Translation("Delete media"),
- *   type = "media",
- *   confirm_form_route_name = "entity.media.multiple_delete_confirm",
- * )
- */
-class DeleteMedia extends ActionBase implements ContainerFactoryPluginInterface {
-
-  /**
-   * The temp store factory.
-   *
-   * @var \Drupal\user\PrivateTempStoreFactory
-   */
-  protected $tempStore;
-
-  /**
-   * The current user.
-   *
-   * @var \Drupal\Core\Session\AccountInterface
-   */
-  protected $currentUser;
-
-  /**
-   * Constructs a new DeleteMedia object.
-   *
-   * @param array $configuration
-   *   A configuration array containing information about the plugin instance.
-   * @param string $plugin_id
-   *   The plugin ID for the plugin instance.
-   * @param mixed $plugin_definition
-   *   The plugin implementation definition.
-   * @param \Drupal\user\PrivateTempStoreFactory $temp_store_factory
-   *   The temp store factory.
-   * @param \Drupal\Core\Session\AccountInterface $current_user
-   *   Current user.
-   */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, PrivateTempStoreFactory $temp_store_factory, AccountInterface $current_user) {
-    parent::__construct($configuration, $plugin_id, $plugin_definition);
-    $this->currentUser = $current_user;
-    $this->tempStore = $temp_store_factory->get('media_multiple_delete_confirm');
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
-    return new static(
-      $configuration,
-      $plugin_id,
-      $plugin_definition,
-      $container->get('user.private_tempstore'),
-      $container->get('current_user')
-    );
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function executeMultiple(array $entities) {
-    $info = [];
-    /** @var \Drupal\media\MediaInterface $media */
-    foreach ($entities as $media) {
-      $langcode = $media->language()->getId();
-      $info[$media->id()][$langcode] = $langcode;
-    }
-    $this->tempStore->set($this->currentUser->id(), $info);
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function execute($object = NULL) {
-    $this->executeMultiple($object ? [$object] : []);
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
-    /** @var \Drupal\media\MediaInterface $object */
-    return $object->access('delete', $account, $return_as_object);
-  }
-
-}
reverted:
--- b/core/modules/media/src/Plugin/Action/PublishMedia.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-namespace Drupal\media\Plugin\Action;
-
-use Drupal\Core\Action\ActionBase;
-use Drupal\Core\Session\AccountInterface;
-use Drupal\media\MediaInterface;
-
-/**
- * Publishes a media item.
- *
- * @Action(
- *   id = "media_publish_action",
- *   label = @Translation("Publish media"),
- *   type = "media"
- * )
- */
-class PublishMedia extends ActionBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function execute(MediaInterface $entity = NULL) {
-    if ($entity) {
-      $entity->setPublished()->save();
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
-    /** @var \Drupal\media\MediaInterface $object */
-    $result = $object->access('update', $account, TRUE)
-      ->andIf($object->status->access('update', $account, TRUE));
-
-    return $return_as_object ? $result : $result->isAllowed();
-  }
-
-}
reverted:
--- b/core/modules/media/src/Plugin/Action/SaveMedia.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-namespace Drupal\media\Plugin\Action;
-
-use Drupal\Core\Action\ActionBase;
-use Drupal\Core\Session\AccountInterface;
-use Drupal\media\MediaInterface;
-
-/**
- * Saves a media item.
- *
- * @Action(
- *   id = "media_save_action",
- *   label = @Translation("Save media"),
- *   type = "media"
- * )
- */
-class SaveMedia extends ActionBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function execute(MediaInterface $entity = NULL) {
-    if ($entity) {
-      // We need to change at least one value, otherwise the changed timestamp
-      // will not be updated.
-      $entity->changed = 0;
-      $entity->save();
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
-    /** @var \Drupal\media\MediaInterface $object */
-    return $object->access('update', $account, $return_as_object);
-  }
-
-}
reverted:
--- b/core/modules/media/src/Plugin/Action/UnpublishMedia.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-namespace Drupal\media\Plugin\Action;
-
-use Drupal\Core\Action\ActionBase;
-use Drupal\Core\Session\AccountInterface;
-use Drupal\media\MediaInterface;
-
-/**
- * Unpublishes a media item.
- *
- * @Action(
- *   id = "media_unpublish_action",
- *   label = @Translation("Unpublish media"),
- *   type = "media"
- * )
- */
-class UnpublishMedia extends ActionBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function execute(MediaInterface $entity = NULL) {
-    if ($entity) {
-      $entity->setUnpublished()->save();
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
-    /** @var \Drupal\media\MediaInterface $object */
-    $result = $object->access('update', $account, TRUE)
-      ->andIf($object->status->access('update', $account, TRUE));
-
-    return $return_as_object ? $result : $result->isAllowed();
-  }
-
-}
diff -u b/core/modules/media/src/Plugin/Field/FieldFormatter/MediaThumbnailFormatter.php b/core/modules/media/src/Plugin/Field/FieldFormatter/MediaThumbnailFormatter.php
--- b/core/modules/media/src/Plugin/Field/FieldFormatter/MediaThumbnailFormatter.php
+++ b/core/modules/media/src/Plugin/Field/FieldFormatter/MediaThumbnailFormatter.php
@@ -35,7 +35,7 @@
   protected $renderer;
 
   /**
-   * Constructs an ImageFormatter object.
+   * Constructs an MediaThumbnailFormatter object.
    *
    * @param string $plugin_id
    *   The plugin_id for the formatter.
diff -u b/core/modules/media/templates/media.html.twig b/core/modules/media/templates/media.html.twig
--- b/core/modules/media/templates/media.html.twig
+++ b/core/modules/media/templates/media.html.twig
@@ -28,6 +28,9 @@
  *
  * @see template_preprocess_media()
  *
+ * @todo Make the HTML wrapper tag for media items more semantically correct.
+ *   https://www.drupal.org/node/2878115
+ *
  * @ingroup themeable
  */
 #}
diff -u b/core/modules/media/tests/src/Functional/MediaAccessTest.php b/core/modules/media/tests/src/Functional/MediaAccessTest.php
--- b/core/modules/media/tests/src/Functional/MediaAccessTest.php
+++ b/core/modules/media/tests/src/Functional/MediaAccessTest.php
@@ -38,6 +38,9 @@
     $user_media->save();
 
     // We are logged in as admin, so test 'administer media' permission.
+    $this->drupalGet('media/add/' . $media_type->id());
+    $this->assertCacheContext('user.permissions');
+    $assert_session->statusCodeEquals(200);
     $this->drupalGet('media/' . $user_media->id());
     $this->assertCacheContext('user.permissions');
     $assert_session->statusCodeEquals(200);
reverted:
--- b/core/modules/media/tests/src/Functional/MediaBulkFormTest.php
+++ /dev/null
@@ -1,113 +0,0 @@
-<?php
-
-namespace Drupal\Tests\media\Functional;
-
-use Drupal\media\Entity\Media;
-use Drupal\views\Views;
-
-/**
- * Tests a media bulk form.
- *
- * @group media
- */
-class MediaBulkFormTest extends MediaFunctionalTestBase {
-
-  /**
-   * Modules to be enabled.
-   *
-   * @var array
-   */
-  public static $modules = ['media_test_views'];
-
-  /**
-   * The test media type.
-   *
-   * @var \Drupal\media\MediaTypeInterface
-   */
-  protected $testMediaType;
-
-  /**
-   * The test media items.
-   *
-   * @var \Drupal\media\MediaInterface[]
-   */
-  protected $mediaItems;
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function setUp() {
-    parent::setUp();
-
-    $this->testMediaType = $this->createMediaType();
-
-    // Create some test media items.
-    $this->mediaItems = [];
-    for ($i = 1; $i <= 5; $i++) {
-      $media = Media::create([
-        'bundle' => $this->testMediaType->id(),
-      ]);
-      $media->save();
-      $this->mediaItems[] = $media;
-    }
-  }
-
-  /**
-   * Tests the media bulk form.
-   */
-  public function testBulkForm() {
-    $session = $this->getSession();
-    $page = $session->getPage();
-    $assert_session = $this->assertSession();
-
-    // Check that all created items are present in the test view.
-    $view = Views::getView('test_media_bulk_form');
-    $view->execute();
-    $this->assertEquals($view->total_rows, 5);
-
-    // Check the operations are accessible to the logged in user.
-    $this->drupalGet('test-media-bulk-form');
-    // Current available actions: Delete, Save, Publish, Unpublish.
-    $available_actions = [
-      'media_delete_action',
-      'media_publish_action',
-      'media_save_action',
-      'media_unpublish_action',
-    ];
-    foreach ($available_actions as $action_name) {
-      $assert_session->optionExists('action', $action_name);
-    }
-
-    // Test unpublishing in bulk.
-    $page->checkField('media_bulk_form[0]');
-    $page->checkField('media_bulk_form[1]');
-    $page->checkField('media_bulk_form[2]');
-    $page->selectFieldOption('action', 'media_unpublish_action');
-    $page->pressButton('Apply to selected items');
-    $assert_session->pageTextContains('Unpublish media was applied to 3 items');
-    $this->assertFalse($this->storage->loadUnchanged(1)->isPublished(), 'The unpublish action failed in some of the media items.');
-    $this->assertFalse($this->storage->loadUnchanged(2)->isPublished(), 'The unpublish action failed in some of the media items.');
-    $this->assertFalse($this->storage->loadUnchanged(3)->isPublished(), 'The unpublish action failed in some of the media items.');
-
-    // Test publishing in bulk.
-    $page->checkField('media_bulk_form[0]');
-    $page->checkField('media_bulk_form[1]');
-    $page->selectFieldOption('action', 'media_publish_action');
-    $page->pressButton('Apply to selected items');
-    $assert_session->pageTextContains('Publish media was applied to 2 items');
-    $this->assertTrue($this->storage->loadUnchanged(1)->isPublished(), 'The publish action failed in some of the media items.');
-    $this->assertTrue($this->storage->loadUnchanged(2)->isPublished(), 'The publish action failed in some of the media items.');
-
-    // Test deletion in bulk.
-    $page->checkField('media_bulk_form[0]');
-    $page->checkField('media_bulk_form[1]');
-    $page->selectFieldOption('action', 'media_delete_action');
-    $page->pressButton('Apply to selected items');
-    $assert_session->pageTextContains('Are you sure you want to delete these items?');
-    $page->pressButton('Delete');
-    $assert_session->pageTextContains('Deleted 2 media items.');
-    $this->assertNull($this->storage->loadUnchanged(1), 'Could not delete some of the media items.');
-    $this->assertNull($this->storage->loadUnchanged(2), 'Could not delete some of the media items.');
-  }
-
-}
diff -u b/core/modules/media/tests/src/Kernel/MediaSourceTest.php b/core/modules/media/tests/src/Kernel/MediaSourceTest.php
--- b/core/modules/media/tests/src/Kernel/MediaSourceTest.php
+++ b/core/modules/media/tests/src/Kernel/MediaSourceTest.php
@@ -278,22 +278,14 @@
       'MediaTestConstraint' => [],
     ]);
 
-    // Create media that uses source plugin with constraints and make sure it
-    // can't be saved without validating them.
+    // Create a media item media that uses a source plugin with constraints and
+    // make sure the constraints works as expected when validating.
     /** @var \Drupal\media\MediaInterface $media */
     $media = Media::create([
       'bundle' => $this->testConstraintsMediaType->id(),
       'name' => 'I do not like Drupal',
       'field_media_test_constraints' => 'Not checked',
     ]);
-    try {
-      $media->save();
-      $this->fail('Save was allowed without validation.');
-    }
-    catch (EntityStorageException $exception) {
-      $this->assertEquals('Entity validation was skipped.', $exception->getMessage(), 'Incorrect validation message.');
-      $this->assertTrue(TRUE, 'Validation was enforced before save.');
-    }
 
     // Validate the entity and make sure violation is reported.
     /** @var \Drupal\Core\Entity\EntityConstraintViolationListInterface $violations */
@@ -325,14 +317,6 @@
       'name' => 'Not checked',
       'field_media_test_constraints' => 'I do not like Drupal',
     ]);
-    try {
-      $media->save();
-      $this->fail('Save was allowed without validation.');
-    }
-    catch (EntityStorageException $exception) {
-      $this->assertEquals('Entity validation was skipped.', $exception->getMessage(), 'Incorrect validation message.');
-      $this->assertTrue(TRUE, 'Validation was enforced before save.');
-    }
 
     // Validate the entity and make sure violation is reported.
     /** @var \Drupal\Core\Entity\EntityConstraintViolationListInterface $violations */
reverted:
--- b/core/modules/media/tests/src/Kernel/MediaTokensTest.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-
-namespace Drupal\Tests\media\Kernel;
-
-use Drupal\Core\Language\Language;
-use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
-use Drupal\media\Entity\Media;
-use Drupal\media\Entity\MediaType;
-
-/**
- * Tests token handling.
- *
- * @group media
- */
-class MediaTokensTest extends EntityKernelTestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public static $modules = [
-    'media',
-    'media_test_source',
-    'path',
-    'file',
-    'image',
-    'datetime',
-    'language',
-  ];
-
-  /**
-   * {@inheritdoc}
-   */
-  protected function setUp() {
-    parent::setUp();
-    $this->installEntitySchema('file');
-    $this->installSchema('file', 'file_usage');
-    $this->installEntitySchema('media');
-    $this->installConfig(['language', 'datetime', 'field', 'system']);
-  }
-
-  /**
-   * Tests some of the tokens provided by Media.
-   */
-  public function testMediaEntityTokens() {
-    // Create a test media type.
-    $media_type_name = $this->randomMachineName();
-
-    MediaType::create([
-      'id' => $media_type_name,
-      'label' => $media_type_name,
-      'source' => 'test',
-      'source_configuration' => ['test_config_value' => 'Kakec'],
-      'field_map' => [],
-      'status' => 1,
-      'new_revision' => FALSE,
-    ])->save();
-
-    // Create a media item.
-    $media = Media::create([
-      'name' => $this->randomMachineName(),
-      'bundle' => $media_type_name,
-      'uid' => '1',
-      'langcode' => Language::LANGCODE_DEFAULT,
-      'status' => TRUE,
-    ]);
-    $media->save();
-
-    $token_service = $this->container->get('token');
-
-    $replaced_value = $token_service->replace('[media:name]', ['media' => $media]);
-    $this->assertEquals($media->label(), $replaced_value, 'Token replacement for the media label was successful.');
-  }
-
-}
diff -u b/core/modules/path/path.module b/core/modules/path/path.module
--- b/core/modules/path/path.module
+++ b/core/modules/path/path.module
@@ -62,7 +62,7 @@
  * Implements hook_entity_base_field_info().
  */
 function path_entity_base_field_info(EntityTypeInterface $entity_type) {
-  if (in_array($entity_type->id(), ['taxonomy_term', 'node', 'media'])) {
+  if (in_array($entity_type->id(), ['taxonomy_term', 'node', 'media'], TRUE)) {
     $fields['path'] = BaseFieldDefinition::create('path')
       ->setLabel(t('URL alias'))
       ->setTranslatable(TRUE)