diff --git a/core/modules/file/tests/src/FunctionalJavascript/FileManagedStateTest.php b/core/modules/file/tests/src/FunctionalJavascript/FileManagedStateTest.php
index c692f73926..35895670be 100644
--- a/core/modules/file/tests/src/FunctionalJavascript/FileManagedStateTest.php
+++ b/core/modules/file/tests/src/FunctionalJavascript/FileManagedStateTest.php
@@ -12,12 +12,15 @@
 class FileManagedStateTest extends WebDriverTestBase {
 
   /**
-   * Modules to enable.
-   *
-   * @var array
+   * {@inheritdoc}
    */
   protected static $modules = ['file_test_states', 'file'];
 
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stark';
+
   /**
    * Tests if managed file is correctly hidden with states.
    */