         # button ElementFinders.
         download: elt.element(By.css('.glyphicon-download'))
         open: elt.element(By.css('.glyphicon-eye-open'))
+        failed: elt.element(By.css('.glyphicon-exclamation-sign'))
 
   # Loads the image by clicking the given download button.
   #

          # The open button should be displayed.
          expect(open.isDisplayed(), 'The open button is hidden after download')
            .to.eventually.be.true

  # protractor config links _public/data to the test fixture data
  # directory.
  TEST_VOL_NBR = 20
  # A Sarcoma001 Session01 volume number for which a test fixture scan
  # image file is missing.
  MISSING_TEST_VOL_NBR = 1

  page = null

