diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityValidationTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityValidationTest.php
index bf2a147e0a..2e4f7bb9b5 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/EntityValidationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityValidationTest.php
@@ -3,6 +3,7 @@
 namespace Drupal\KernelTests\Core\Entity;
 
 use Drupal\Core\Entity\Plugin\Validation\Constraint\CompositeConstraintBase;
+use Drupal\language\Entity\ConfigurableLanguage;
 
 /**
  * Tests the Entity Validation API.
@@ -16,7 +17,7 @@ class EntityValidationTest extends EntityKernelTestBase {
    *
    * @var array
    */
-  public static $modules = ['filter', 'text'];
+  public static $modules = ['filter', 'text', 'language'];
 
   /**
    * @var string
@@ -39,6 +40,10 @@ class EntityValidationTest extends EntityKernelTestBase {
   protected function setUp() {
     parent::setUp();
 
+    // Enable an additional language.
+    ConfigurableLanguage::createFromLangcode('de')
+      ->save();
+
     // Create the test field.
     module_load_install('entity_test');
     entity_test_install();
@@ -200,4 +205,42 @@ public function testCompositeConstraintValidation() {
     $this->assertEqual($constraint->coversFields(), ['name', 'type'], 'Information about covered fields can be retrieved.');
   }
 
+  /**
+   * Tests the EntityChangedConstraintValidator.
+   */
+  public function testEntityChangedConstraintOnFormConcurrentEditing() {
+    $this->installEntitySchema('entity_test_mulrev_changed');
+    $storage = \Drupal::entityTypeManager()
+      ->getStorage('entity_test_mulrev_changed');
+
+    // Create a test entity.
+    $entity = $this->createTestEntity('entity_test_mulrev_changed');
+    $entity->save();
+
+    $entity->setChangedTime($entity->getChangedTime() - 1);
+    $violations = $entity->validate();
+    $this->assertEquals(1, $violations->count());
+    $this->assertEqual($violations[0]->getMessage(), 'The content has either been modified by another user, or you have already submitted modifications. As a result, your changes cannot be saved.');
+
+    $entity = $storage->loadUnchanged($entity->id());
+    $translation = $entity->addTranslation('de');
+    $entity->save();
+
+    $this->assertNotEquals($entity->getChangedTime(), $translation->getChangedTime());
+
+    // Simulate form concurrent editing by saving the entity with an altered
+    // non-translatable field and afterwards setting the previous timestamp of
+    // an entity translation on the updated entity object and validating it as
+    // this is exactly what happens in the form API where we put the changed
+    // time of the entity used to build the form in a hidden value and then set
+    // it on the entity that is being loaded from the storage.
+    $original_entity_time = $entity->getChangedTime();
+    $entity->set('not_translatable', $this->randomString());
+    $entity->save();
+    $entity->setChangedTime($original_entity_time);
+    $violations = $entity->validate();
+    $this->assertEquals(1, $violations->count());
+    $this->assertEqual($violations[0]->getMessage(), 'The content has either been modified by another user, or you have already submitted modifications. As a result, your changes cannot be saved.');
+  }
+
 }