getRequest()->setParam( 'widget', '{"widget_type":"Magento\\\\Cms\\\\Block\\\\Widget\\\\Page\\\\Link","values":{}}' ); $this->dispatch('backend/admin/widget/loadOptions'); $output = $this->getResponse()->getBody(); //searching for label with text "CMS Page" $this->assertContains( 'data-ui-id="wysiwyg-widget-options-fieldset-element-label-parameters-page-id-label" >' . 'CMS Page', $output ); } }