diff --git a/js_example/js_example.info.yml b/js_example/js_example.info.yml
index d17e0e9..219e014 100755
--- a/js_example/js_example.info.yml
+++ b/js_example/js_example.info.yml
@@ -6,3 +6,4 @@ core: 8.x
 dependencies:
   - drupal:node
   - examples:examples
+  - jquery_ui_accordion:jquery_ui_accordion
diff --git a/js_example/js_example.libraries.yml b/js_example/js_example.libraries.yml
index 496f748..af53a49 100644
--- a/js_example/js_example.libraries.yml
+++ b/js_example/js_example.libraries.yml
@@ -5,7 +5,7 @@ js_example.accordion:
   # Build up our dependencies for this page as a library. Our accordion script
   # needs jquery.ui.accordion. You can find the core scripts under core/assets/.
   dependencies:
-    - core/jquery.ui.accordion
+    - jquery_ui_accordion/accordion
 
 # Show how weights work.
 js_example.weights:
diff --git a/tests/src/Functional/ExamplesBrowserTestBase.php b/tests/src/Functional/ExamplesBrowserTestBase.php
index 70c599d..d71ff51 100644
--- a/tests/src/Functional/ExamplesBrowserTestBase.php
+++ b/tests/src/Functional/ExamplesBrowserTestBase.php
@@ -12,6 +12,11 @@ use Drupal\Tests\BrowserTestBase;
  */
 abstract class ExamplesBrowserTestBase extends BrowserTestBase {
 
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stark';
+
   /**
    * Modules to install.
    *