'Scenario: I should be reprimanded for trying to upload something that isn\'t a .tar.gz file.
Given that I select a file that is an .mp4 for upload
An error message will appear'

def test_bad_filename_error(self):

    self.import_page.upload_tarball('funny_cat_video.mp4')
    self.import_page.wait_for_filename_error()
