diff --git a/core/modules/ban/lib/Drupal/ban/BanIpManager.php b/core/modules/ban/lib/Drupal/ban/BanIpManager.php
index c65ee8f90ce..3e6028cde3e 100644
--- a/core/modules/ban/lib/Drupal/ban/BanIpManager.php
+++ b/core/modules/ban/lib/Drupal/ban/BanIpManager.php
@@ -12,7 +12,7 @@ use Drupal\Core\Database\Connection;
 /**
  * Ban IP manager.
  */
-class BanIpManager {
+class BanIpManager implements BanIpManagerInterface {
 
   /**
    * The database connection used to check the IP against.
@@ -32,33 +32,21 @@ class BanIpManager {
   }
 
   /**
-   * Returns if this IP address is banned.
-   *
-   * @param string $ip
-   *   The IP address to check.
-   *
-   * @return bool
-   *   TRUE if the IP address is banned, FALSE otherwise.
+   * {@inheritdoc}
    */
   public function isBanned($ip) {
     return (bool) $this->connection->query("SELECT * FROM {ban_ip} WHERE ip = :ip", array(':ip' => $ip))->fetchField();
   }
 
   /**
-   * Finds all banned IP addresses.
-   *
-   * @return \Drupal\Core\Database\StatementInterface
-   *   The result of the database query.
+   * {@inheritdoc}
    */
   public function findAll() {
     return $this->connection->query('SELECT * FROM {ban_ip}');
   }
 
   /**
-   * Bans an IP address.
-   *
-   * @param string $ip
-   *   The IP address to ban.
+   * {@inheritdoc}
    */
   public function banIp($ip) {
     $this->connection->insert('ban_ip')
@@ -67,10 +55,7 @@ class BanIpManager {
   }
 
   /**
-   * Unbans an IP address.
-   *
-   * @param string $id
-   *   The IP address to unban.
+   * {@inheritdoc}
    */
   public function unbanIp($id) {
     $this->connection->delete('ban_ip')
@@ -79,16 +64,9 @@ class BanIpManager {
   }
 
   /**
-   * Finds a banned IP address by its ID.
-   *
-   * @param int $ban_id
-   *   The ID for a banned IP address.
-   *
-   * @return string|false
-   *   Either the banned IP address or FALSE if none exist with that ID.
+   * {@inheritdoc}
    */
   public function findById($ban_id) {
     return $this->connection->query("SELECT ip FROM {ban_ip} WHERE iid = :iid", array(':iid' => $ban_id))->fetchField();
   }
-
 }
diff --git a/core/modules/ban/lib/Drupal/ban/BanIpManagerInterface.php b/core/modules/ban/lib/Drupal/ban/BanIpManagerInterface.php
new file mode 100755
index 00000000000..331554b01f8
--- /dev/null
+++ b/core/modules/ban/lib/Drupal/ban/BanIpManagerInterface.php
@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\ban\BanIpManagerInterface.
+ */
+
+namespace Drupal\ban;
+
+/**
+ * Provides an interface defining a BanIp manager.
+ */
+interface BanIpManagerInterface {
+
+  /**
+   * Returns if this IP address is banned.
+   *
+   * @param string $ip
+   *   The IP address to check.
+   *
+   * @return bool
+   *   TRUE if the IP address is banned, FALSE otherwise.
+   */
+  public function isBanned($ip);
+
+  /**
+   * Finds all banned IP addresses.
+   *
+   * @return \Drupal\Core\Database\StatementInterface
+   *   The result of the database query.
+   */
+  public function findAll();
+
+  /**
+   * Bans an IP address.
+   *
+   * @param string $ip
+   *   The IP address to ban.
+   */
+  public function banIp($ip);
+
+  /**
+   * Unbans an IP address.
+   *
+   * @param string $id
+   *   The IP address to unban.
+   */
+  public function unbanIp($id);
+
+  /**
+   * Finds a banned IP address by its ID.
+   *
+   * @param int $ban_id
+   *   The ID for a banned IP address.
+   *
+   * @return string|false
+   *   Either the banned IP address or FALSE if none exist with that ID.
+   */
+  public function findById($ban_id);
+
+}
diff --git a/core/modules/ban/lib/Drupal/ban/EventSubscriber/BanSubscriber.php b/core/modules/ban/lib/Drupal/ban/EventSubscriber/BanSubscriber.php
index 4db39a6e064..d791ec351f8 100644
--- a/core/modules/ban/lib/Drupal/ban/EventSubscriber/BanSubscriber.php
+++ b/core/modules/ban/lib/Drupal/ban/EventSubscriber/BanSubscriber.php
@@ -12,7 +12,7 @@ use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
-use Drupal\ban\BanIpManager;
+use Drupal\ban\BanIpManagerInterface;
 use Drupal\Component\Utility\String;
 
 /**
@@ -23,17 +23,17 @@ class BanSubscriber implements EventSubscriberInterface {
   /**
    * The manager used to check the IP against.
    *
-   * @var \Drupal\ban\BanIpManager
+   * @var \Drupal\ban\BanIpManagerInterface
    */
   protected $manager;
 
   /**
    * Construct the BanSubscriber.
    *
-   * @param \Drupal\ban\BanIpManager $manager
+   * @param \Drupal\ban\BanIpManagerInterface $manager
    *   The manager used to check the IP against.
    */
-  public function __construct(BanIpManager $manager) {
+  public function __construct(BanIpManagerInterface $manager) {
     $this->manager = $manager;
   }
 
diff --git a/core/modules/ban/lib/Drupal/ban/Form/BanAdmin.php b/core/modules/ban/lib/Drupal/ban/Form/BanAdmin.php
index bfaeb7ac258..bc83c541026 100644
--- a/core/modules/ban/lib/Drupal/ban/Form/BanAdmin.php
+++ b/core/modules/ban/lib/Drupal/ban/Form/BanAdmin.php
@@ -8,7 +8,7 @@
 namespace Drupal\ban\Form;
 
 use Drupal\Core\Form\FormBase;
-use Drupal\ban\BanIpManager;
+use Drupal\ban\BanIpManagerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -17,16 +17,16 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
 class BanAdmin extends FormBase {
 
   /**
-   * @var \Drupal\ban\BanIpManager
+   * @var \Drupal\ban\BanIpManagerInterface
    */
   protected $ipManager;
 
   /**
    * Constructs a new BanAdmin object.
    *
-   * @param \Drupal\ban\BanIpManager $ip_manager
+   * @param \Drupal\ban\BanIpManagerInterface $ip_manager
    */
-  public function __construct(BanIpManager $ip_manager) {
+  public function __construct(BanIpManagerInterface $ip_manager) {
     $this->ipManager = $ip_manager;
   }
 
diff --git a/core/modules/ban/lib/Drupal/ban/Form/BanDelete.php b/core/modules/ban/lib/Drupal/ban/Form/BanDelete.php
index e8fce2ed9cf..69b6e90df49 100644
--- a/core/modules/ban/lib/Drupal/ban/Form/BanDelete.php
+++ b/core/modules/ban/lib/Drupal/ban/Form/BanDelete.php
@@ -8,7 +8,7 @@
 namespace Drupal\ban\Form;
 
 use Drupal\Core\Form\ConfirmFormBase;
-use Drupal\ban\BanIpManager;
+use Drupal\ban\BanIpManagerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
@@ -27,10 +27,10 @@ class BanDelete extends ConfirmFormBase {
   /**
    * Constructs a new BanDelete object.
    *
-   * @param \Drupal\ban\BanIpManager $ip_manager
+   * @param \Drupal\ban\BanIpManagerInterface $ip_manager
    *   The IP manager.
    */
-  public function __construct(BanIpManager $ip_manager) {
+  public function __construct(BanIpManagerInterface $ip_manager) {
     $this->ipManager = $ip_manager;
   }