diff --git a/tests/styles/views_plugin_style.test b/tests/styles/views_plugin_style.test
index dfc5413..865e568 100644
--- a/tests/styles/views_plugin_style.test
+++ b/tests/styles/views_plugin_style.test
@@ -241,7 +241,7 @@ class ViewsPluginStyleTestCase extends ViewsPluginStyleTestBase {
     // Setup some random css class.
     $view->init_display();
     $view->init_style();
-    $random_name = $this->randomName();
+    $random_name = drupal_html_class($this->randomName());
     $view->style_plugin->options['row_class'] = $random_name . " test-token-[name]";
 
     $rendered_output = $view->preview();