diff --git a/tests/src/Functional/LoadTest.php b/tests/src/Functional/LoadTest.php
index f60fdd4..7e5a114 100644
--- a/tests/src/Functional/LoadTest.php
+++ b/tests/src/Functional/LoadTest.php
@@ -12,6 +12,11 @@ use Drupal\Tests\BrowserTestBase;
  */
 class LoadTest extends BrowserTestBase {
 
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stark';
+
   /**
    * Modules to enable.
    *