diff --git a/module/VuFind/src/VuFindTest/Unit/ViewHelperTestCase.php b/module/VuFind/src/VuFindTest/Unit/ViewHelperTestCase.php
index f8c0f8ec452982b34a841669b54d0e0d351c2295..99ae2b0951d4922a751482b9fa7816587d100a80 100644
--- a/module/VuFind/src/VuFindTest/Unit/ViewHelperTestCase.php
+++ b/module/VuFind/src/VuFindTest/Unit/ViewHelperTestCase.php
@@ -47,7 +47,7 @@ abstract class ViewHelperTestCase extends TestCase
      *
      * @return \Zend\View\Renderer\PhpRenderer
      */
-    protected function getPhpRenderer($plugins = [], $theme = 'blueprint')
+    protected function getPhpRenderer($plugins = [], $theme = 'bootstrap3')
     {
         $resolver = new \Zend\View\Resolver\TemplatePathStack();