--- /dev/null
+<?php
+
+namespace Drupal\Tests\system\Functional\Theme;
+
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Tests autocompletion not loading registry.
+ *
+ * @group Theme
+ */
+class FastTest extends BrowserTestBase {
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['theme_test'];
+
+ protected function setUp() {
+ parent::setUp();
+ $this->account = $this->drupalCreateUser(['access user profiles']);
+ }
+
+ /**
+ * Tests access to user autocompletion and verify the correct results.
+ */
+ public function testUserAutocomplete() {
+ $this->drupalLogin($this->account);
+ $this->drupalGet('user/autocomplete', ['query' => ['q' => $this->account->getUsername()]]);
+ $this->assertRaw($this->account->getUsername());
+ $this->assertNoText('registry initialized', 'The registry was not initialized');
+ }
+
+}