.../tests/src/FunctionalJavascript/TranslationsTest.php              | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/modules/media_library/tests/src/FunctionalJavascript/TranslationsTest.php b/core/modules/media_library/tests/src/FunctionalJavascript/TranslationsTest.php
index 2696fca631..1d7506a2e5 100644
--- a/core/modules/media_library/tests/src/FunctionalJavascript/TranslationsTest.php
+++ b/core/modules/media_library/tests/src/FunctionalJavascript/TranslationsTest.php
@@ -34,6 +34,11 @@ class TranslationsTest extends WebDriverTestBase {
     'views',
   ];
 
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stark';
+
   /**
    * {@inheritdoc}
    */