'Asserts that we fail validation if we do not have the {{message_body}} tag
in the submitted plain template'

def test_missing_message_body_in_plain(self):

    form_data = {'html_template': '{{message_body}}', 'plain_template': '', 'name': ''}
    form = CourseEmailTemplateForm(form_data)
    self.assertFalse(form.is_valid())
