--- /dev/null
+<?php
+
+/**
+ * @file
+ * Test support module for entity serialization tests.
+ */
+
+use Drupal\Core\Access\AccessResult;
+
+/**
+ * Implements hook_entity_field_access_alter().
+ *
+ * Overrides some default access control to support testing.
+ *
+ * @see Drupal\serialization\Tests\EntitySerializationTest::testUserNormalize()
+ */
+function entity_serialization_test_entity_field_access_alter(array &$grants, array $context) {
+ // Override default access control from UserAccessControlHandler to allow
+ // access to 'pass' field for the test user.
+ if ($context['field_definition']->getName() == 'pass' && $context['account']->getUsername() == 'serialization_test_user') {
+ $grants[':default'] = AccessResult::allowed()->inheritCacheability($grants[':default'])->addCacheableDependency($context['items']->getEntity());
+ }
+}