diff --git a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityOperationsTest.php b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityOperationsTest.php
new file mode 100644
index 0000000..a9c5319
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityOperationsTest.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\system\Tests\Entity\EntityOperationsTest.
+ */
+
+namespace Drupal\system\Tests\Entity;
+
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests for entity operations.
+ */
+class EntityOperationsTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('entity_test');
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Entity Operations',
+      'description' => 'Check that operations can be injected from the hook.',
+      'group' => 'Entity API',
+    );
+  }
+
+  public function setUp() {
+    parent::setUp();
+
+    // Create and login user.
+    $this->web_user = $this->drupalCreateUser(array(
+      'administer permissions',
+    ));
+    $this->drupalLogin($this->web_user);
+  }
+
+  /**
+   * Check hook_entity_operation_alter hook is executed.
+   */
+  public function testEntityOperationAlter() {
+    // Check that role listing contain our test_operation operation.
+    $this->drupalGet('admin/people/roles');
+    $roles = user_roles();
+    foreach ($roles as $role) {
+      $uri = $role->uri();
+      $this->assertLinkByHref($uri['path'] . '/test_operation');
+      $this->assertLink('Test Operation: ' . $role->label());
+    }
+  }
+}
diff --git a/core/modules/system/tests/modules/entity_test/entity_test.module b/core/modules/system/tests/modules/entity_test/entity_test.module
index 3ba9e09..4a39f90 100644
--- a/core/modules/system/tests/modules/entity_test/entity_test.module
+++ b/core/modules/system/tests/modules/entity_test/entity_test.module
@@ -381,7 +381,7 @@ function entity_test_entity_form_display_alter(EntityFormDisplay $form_display,
 }
 
 /**
- * Implements hook_entity_presave()
+ * Implements hook_entity_presave().
  */
 function entity_test_entity_presave(EntityInterface $entity) {
   if (isset($GLOBALS['entity_test_throw_exception'])) {
@@ -390,10 +390,22 @@ function entity_test_entity_presave(EntityInterface $entity) {
 }
 
 /**
- * Implements hook_entity_predelete()
+ * Implements hook_entity_predelete().
  */
 function entity_test_entity_predelete(EntityInterface $entity) {
   if (isset($GLOBALS['entity_test_throw_exception'])) {
     throw new Exception('Entity predelete exception', 2);
   }
 }
+
+/**
+ * Implements hook_entity_operation_alter().
+ */
+function entity_test_entity_operation_alter(array &$operations, EntityInterface $entity) {
+  $uri = $entity->uri();
+  $operations['test_operation'] = array(
+    'title' => 'Test Operation: ' . $entity->label(),
+    'href' => $uri['path'] . '/test_operation',
+    'weight' => 50,
+  );
+}
\ No newline at end of file