diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
index adeb43d..a0f07ae 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
@@ -198,6 +198,15 @@ public function onEntityTypeCreate(EntityTypeInterface $entity_type) {
         $schema_handler->createTable($table_name, $table_schema);
       }
     }
+
+    // Explicitly create the tables for base fields with dedicated tables.
+    $table_mapping = $this->storage->getTableMapping();
+    foreach ($this->entityManager->getFieldStorageDefinitions($this->entityType->id()) as $field_storage_definition) {
+      if ($field_storage_definition->isBaseField() && $table_mapping->requiresDedicatedTableStorage($field_storage_definition)) {
+        $this->onFieldStorageDefinitionCreate($field_storage_definition);
+      }
+    }
+
     $this->saveEntitySchemaData($entity_type, $schema);
   }
 
diff --git a/core/lib/Drupal/Core/Session/SessionHandler.php b/core/lib/Drupal/Core/Session/SessionHandler.php
index c8d69fb..7a446dd 100644
--- a/core/lib/Drupal/Core/Session/SessionHandler.php
+++ b/core/lib/Drupal/Core/Session/SessionHandler.php
@@ -121,7 +121,7 @@ public function read($sid) {
     // active user.
     if ($values && $values['uid'] > 0 && $values['status'] == 1) {
       // Add roles element to $user.
-      $rids = $this->connection->query("SELECT ur.rid FROM {users_roles} ur WHERE ur.uid = :uid", array(
+      $rids = $this->connection->query("SELECT ur.roles_value as rid FROM {user__roles} ur WHERE ur.entity_id = :uid", array(
         ':uid' => $values['uid'],
       ))->fetchCol();
       $values['roles'] = array_merge(array(DRUPAL_AUTHENTICATED_RID), $rids);
diff --git a/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php b/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
index 243f48d..ce557c4 100644
--- a/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
+++ b/core/modules/system/src/Tests/Entity/EntityUnitTestBase.php
@@ -56,8 +56,7 @@ protected function setUp() {
    * @param array $values
    *   (optional) The values used to create the entity.
    * @param array $permissions
-   *   (optional) Array of permission names to assign to user. The
-   *   users_roles tables must be installed before this can be used.
+   *   (optional) Array of permission names to assign to user.
    *
    * @return \Drupal\user\Entity\User
    *   The created user entity.
diff --git a/core/modules/user/config/install/views.view.user_admin_people.yml b/core/modules/user/config/install/views.view.user_admin_people.yml
index ee79c86..1d19efb 100644
--- a/core/modules/user/config/install/views.view.user_admin_people.yml
+++ b/core/modules/user/config/install/views.view.user_admin_people.yml
@@ -298,7 +298,7 @@ display:
           provider: views
         rid:
           id: rid
-          table: users_roles
+          table: user__roles
           field: rid
           relationship: none
           group_type: group
@@ -657,7 +657,7 @@ display:
           plugin_id: combine
         rid:
           id: rid
-          table: users_roles
+          table: user__roles
           field: rid
           relationship: none
           group_type: group
@@ -698,7 +698,7 @@ display:
           provider: user
         permission:
           id: permission
-          table: users_roles
+          table: user__roles
           field: permission
           relationship: none
           group_type: group
diff --git a/core/modules/user/config/schema/user.views.schema.yml b/core/modules/user/config/schema/user.views.schema.yml
index fc8a7fd..b879285 100644
--- a/core/modules/user/config/schema/user.views.schema.yml
+++ b/core/modules/user/config/schema/user.views.schema.yml
@@ -23,7 +23,7 @@ views.argument.user_uid:
   type: views.argument.numeric
   label: 'User ID'
 
-views.argument.users_roles_rid:
+views.argument.user__roles_rid:
   type: views.argument.many_to_one
   label: 'Role ID'
 
diff --git a/core/modules/user/src/Entity/User.php b/core/modules/user/src/Entity/User.php
index eb46586..b5a8dde 100644
--- a/core/modules/user/src/Entity/User.php
+++ b/core/modules/user/src/Entity/User.php
@@ -130,12 +130,6 @@ public function postSave(EntityStorageInterface $storage, $update = TRUE) {
         }
       }
 
-      // Update user roles if changed.
-      if ($this->getRoles() != $this->original->getRoles()) {
-        $storage->deleteUserRoles(array($this->id()));
-        $storage->saveRoles($this);
-      }
-
       // If the user was blocked, delete the user's sessions to force a logout.
       if ($this->original->status->value != $this->status->value && $this->status->value == 0) {
         $session_manager->delete($this->id());
@@ -148,12 +142,6 @@ public function postSave(EntityStorageInterface $storage, $update = TRUE) {
         _user_mail_notify($op, $this);
       }
     }
-    else {
-      // Save user roles.
-      if (count($this->getRoles()) > 1) {
-        $storage->saveRoles($this);
-      }
-    }
   }
 
   /**
@@ -164,7 +152,6 @@ public static function postDelete(EntityStorageInterface $storage, array $entiti
 
     $uids = array_keys($entities);
     \Drupal::service('user.data')->delete(NULL, $uids);
-    $storage->deleteUserRoles($uids);
   }
 
   /**
@@ -534,7 +521,6 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     // @todo Convert this to entity_reference_field, see
     // https://drupal.org/node/2044859.
     $fields['roles'] = BaseFieldDefinition::create('string')
-      ->setCustomStorage(TRUE)
       ->setLabel(t('Roles'))
       ->setCardinality(BaseFieldDefinition::CARDINALITY_UNLIMITED)
       ->setDescription(t('The roles the user has.'));
diff --git a/core/modules/user/src/Plugin/entity_reference/selection/UserSelection.php b/core/modules/user/src/Plugin/entity_reference/selection/UserSelection.php
index 3820628..cda2429 100644
--- a/core/modules/user/src/Plugin/entity_reference/selection/UserSelection.php
+++ b/core/modules/user/src/Plugin/entity_reference/selection/UserSelection.php
@@ -131,16 +131,5 @@ public function entityQueryAlter(SelectInterface $query) {
         }
       }
     }
-
-    // Add the filter by role option.
-    if (!empty($this->fieldDefinition->getSetting('handler_settings')['filter'])) {
-      $filter_settings = $this->fieldDefinition->getSetting('handler_settings')['filter'];
-      if ($filter_settings['type'] == 'role') {
-        $tables = $query->getTables();
-        $base_table = $tables['base_table']['alias'];
-        $query->join('users_roles', 'ur', $base_table . '.uid = ur.uid');
-        $query->condition('ur.rid', $filter_settings['role']);
-      }
-    }
   }
 }
diff --git a/core/modules/user/src/Plugin/views/argument/RolesRid.php b/core/modules/user/src/Plugin/views/argument/RolesRid.php
index 8c7fc7f..bbc5ab9 100644
--- a/core/modules/user/src/Plugin/views/argument/RolesRid.php
+++ b/core/modules/user/src/Plugin/views/argument/RolesRid.php
@@ -17,7 +17,7 @@
  *
  * @ingroup views_argument_handlers
  *
- * @ViewsArgument("users_roles_rid")
+ * @ViewsArgument("user__roles_rid")
  */
 class RolesRid extends ManyToOne {
 
diff --git a/core/modules/user/src/Plugin/views/field/Roles.php b/core/modules/user/src/Plugin/views/field/Roles.php
index 57506a8..b4d7448 100644
--- a/core/modules/user/src/Plugin/views/field/Roles.php
+++ b/core/modules/user/src/Plugin/views/field/Roles.php
@@ -79,7 +79,7 @@ public function preRender(&$values) {
 
     if ($uids) {
       $roles = user_roles();
-      $result = $this->database->query('SELECT u.uid, u.rid FROM {users_roles} u WHERE u.uid IN (:uids) AND u.rid IN (:rids)', array(':uids' => $uids, ':rids' => array_keys($roles)));
+      $result = $this->database->query('SELECT u.entity_id as uid, u.roles_value as rid FROM {user__roles} u WHERE u.entity_id IN (:uids) AND u.roles_value IN (:rids)', array(':uids' => $uids, ':rids' => array_keys($roles)));
       foreach ($result as $role) {
         $this->items[$role->uid][$role->rid]['role'] = String::checkPlain($roles[$role->rid]->label());
         $this->items[$role->uid][$role->rid]['rid'] = $role->rid;
diff --git a/core/modules/user/src/RoleStorage.php b/core/modules/user/src/RoleStorage.php
index 2afd00e..a3f6d0f 100644
--- a/core/modules/user/src/RoleStorage.php
+++ b/core/modules/user/src/RoleStorage.php
@@ -34,8 +34,8 @@ public function isPermissionInRoles($permission, array $rids) {
    */
   public function deleteRoleReferences(array $rids) {
     // Remove the role from all users.
-    db_delete('users_roles')
-      ->condition('rid', $rids)
+    db_delete('user__roles')
+      ->condition('target_id', $rids)
       ->execute();
   }
 
diff --git a/core/modules/user/src/UserStorage.php b/core/modules/user/src/UserStorage.php
index 9aa844e..638dfc7 100644
--- a/core/modules/user/src/UserStorage.php
+++ b/core/modules/user/src/UserStorage.php
@@ -68,25 +68,6 @@ public static function createInstance(ContainerInterface $container, EntityTypeI
   /**
    * {@inheritdoc}
    */
-  function mapFromStorageRecords(array $records) {
-    foreach ($records as $record) {
-      $record->roles = array();
-      if ($record->uid) {
-        $record->roles[] = DRUPAL_AUTHENTICATED_RID;
-      }
-      else {
-        $record->roles[] = DRUPAL_ANONYMOUS_RID;
-      }
-    }
-
-    // Add any additional roles from the database.
-    $this->addRoles($records);
-    return parent::mapFromStorageRecords($records);
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function save(EntityInterface $entity) {
     // The anonymous user account is saved with the fixed user ID of 0.
     // Therefore we need to check for NULL explicitly.
@@ -108,43 +89,6 @@ protected function isColumnSerial($table_name, $schema_name) {
   /**
    * {@inheritdoc}
    */
-  public function saveRoles(UserInterface $account) {
-    $query = $this->database->insert('users_roles')->fields(array('uid', 'rid'));
-    foreach ($account->getRoles() as $rid) {
-      if (!in_array($rid, array(DRUPAL_ANONYMOUS_RID, DRUPAL_AUTHENTICATED_RID))) {
-        $query->values(array(
-          'uid' => $account->id(),
-          'rid' => $rid,
-        ));
-      }
-    }
-    $query->execute();
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function addRoles(array $users) {
-    if ($users) {
-      $result = $this->database->query('SELECT rid, uid FROM {users_roles} WHERE uid IN (:uids)', array(':uids' => array_keys($users)));
-      foreach ($result as $record) {
-        $users[$record->uid]->roles[] = $record->rid;
-      }
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function deleteUserRoles(array $uids) {
-    $this->database->delete('users_roles')
-      ->condition('uid', $uids)
-      ->execute();
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function updateLastLoginTimestamp(UserInterface $account) {
     $this->database->update('users_field_data')
       ->fields(array('login' => $account->getLastLoginTime()))
diff --git a/core/modules/user/src/UserStorageInterface.php b/core/modules/user/src/UserStorageInterface.php
index a73b58b..2a114c5 100644
--- a/core/modules/user/src/UserStorageInterface.php
+++ b/core/modules/user/src/UserStorageInterface.php
@@ -15,27 +15,6 @@
 interface UserStorageInterface {
 
   /**
-   * Add any roles from the storage to the user.
-   *
-   * @param array $users
-   */
-  public function addRoles(array $users);
-
-  /**
-   * Save the user's roles.
-   *
-   * @param \Drupal\user\UserInterface $account
-   */
-  public function saveRoles(UserInterface $account);
-
-  /**
-   * Remove the roles of a user.
-   *
-   * @param array $uids
-   */
-  public function deleteUserRoles(array $uids);
-
-  /**
    * Update the last login timestamp of the user.
    *
    * @param \Drupal\user\UserInterface $account
diff --git a/core/modules/user/src/UserViewsData.php b/core/modules/user/src/UserViewsData.php
index 0d5e544..c8f0510 100644
--- a/core/modules/user/src/UserViewsData.php
+++ b/core/modules/user/src/UserViewsData.php
@@ -404,17 +404,17 @@ public function getViewsData() {
 
     // Define the base group of this table. Fields that don't have a group defined
     // will go into this field by default.
-    $data['users_roles']['table']['group']  = t('User');
+    $data['user__roles']['table']['group']  = t('User');
 
     // Explain how this table joins to others.
-    $data['users_roles']['table']['join'] = array(
+    $data['user__roles']['table']['join'] = array(
       'users' => array(
         'left_field' => 'uid',
         'field' => 'uid',
       ),
     );
 
-    $data['users_roles']['rid'] = array(
+    $data['user__roles']['rid'] = array(
       'title' => t('Roles'),
       'help' => t('Roles that a user belongs to.'),
       'field' => array(
@@ -426,7 +426,7 @@ public function getViewsData() {
         'allow empty' => TRUE,
       ),
       'argument' => array(
-        'id' => 'users_roles_rid',
+        'id' => 'user__roles_rid',
         'name table' => 'role',
         'name field' => 'name',
         'empty field name' => t('No role'),
@@ -435,7 +435,7 @@ public function getViewsData() {
       ),
     );
 
-    $data['users_roles']['permission'] = array(
+    $data['user__roles']['permission'] = array(
       'title' => t('Permission'),
       'help' => t('The user permissions.'),
       'field' => array(
diff --git a/core/profiles/standard/standard.install b/core/profiles/standard/standard.install
index c2b5582..fdca17c 100644
--- a/core/profiles/standard/standard.install
+++ b/core/profiles/standard/standard.install
@@ -5,6 +5,7 @@
  */
 
 use Drupal\comment\Plugin\Field\FieldType\CommentItemInterface;
+use Drupal\user\Entity\User;
 
 /**
  * Implements hook_install().
@@ -45,9 +46,9 @@ function standard_install() {
   $user_settings->set('admin_role', 'administrator')->save();
 
   // Assign user 1 the "administrator" role.
-  db_insert('users_roles')
-    ->fields(array('uid' => 1, 'rid' => 'administrator'))
-    ->execute();
+  $user = User::load(1);
+  $user->roles[] = 'administrator';
+  $user->save();
 
   // Enable the Contact link in the footer menu.
   /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */