Update to Drupal 8.1.1. For more information, see https://www.drupal.org/node/2718713

core/modules/image/src/Tests/ImageFieldWidgetTest.php

@@ -29,4 +29,3 @@ class ImageFieldWidgetTest extends ImageFieldTestBase {
   }
 
 }
-

core/modules/image/src/Tests/ImageOnTranslatedEntityTest.php

@@ -36,7 +36,7 @@ class ImageOnTranslatedEntityTest extends ImageFieldTestBase {
     $this->fieldName = strtolower($this->randomMachineName());
     $this->createImageField($this->fieldName, 'basicpage', [], ['title_field' => 1]);
 
-    // Create and login user.
+    // Create and log in user.
     $permissions = array(
       'access administration pages',
       'administer content translation',