protected DocumentBasePage startDefaultSerialWorkflow(
     DocumentBasePage filePage, final String username) {
   // start workflow
   SummaryTabSubPage summaryTabPage = filePage.getSummaryTab();
   summaryTabPage.startDefaultWorkflow();
   assertTrue(
       summaryTabPage
           .workflowTasksForm
           .getText()
           .contains("Please select some participants for the review"));
   // click on the workflow tab
   WorkflowTabSubPage workflowTab = filePage.getWorkflow();
   workflowTab.showGraphView();
   workflowTab.closeGraphView();
   workflowTab.addWorkflowReviewer(username);
   workflowTab.startWorkflow();
   summaryTabPage = filePage.getSummaryTab();
   assertTrue(summaryTabPage.workflowAlreadyStarted());
   return filePage;
 }