old_contents: from collections import OrderedDict
  from elifetools.utils import date_struct
  
  
  expected = [
      OrderedDict([
          ('event_type', 'preprint-publication'),
          ('event_desc', 'This article was originally published as a <ext-link ext-link-type="uri" xlink:href="https://www.biorxiv.org/content/early/2017/03/24/118356">preprint on Biorxiv</ext-link>'),
          ('event_desc_html', 'This article was originally published as a <a href="https://www.biorxiv.org/content/early/2017/03/24/118356">preprint on Biorxiv</a>'),
          ('uri', 'https://www.biorxiv.org/content/early/2017/03/24/118356'),
          ('uri_text', 'preprint on Biorxiv'),
          ('day', '24'),
          ('month', '03'),
          ('year', '2017'),
          (u'date', date_struct(2017, 3, 24)),
          ('iso-8601-date', '2017-03-24')
          ])
      ]
  
new_contents: from collections import OrderedDict
  from elifetools.utils import date_struct
  
  
  expected = [
      OrderedDict([
          ('event_type', 'preprint-publication'),
          ('event_desc', 'This article was originally published as a <ext-link ext-link-type="uri" xlink:href="https://www.biorxiv.org/content/early/2017/03/24/118356">preprint on Biorxiv</ext-link>'),
          ('event_desc_html', 'This article was originally published as a <a href="https://www.biorxiv.org/content/early/2017/03/24/118356">preprint on Biorxiv</a>'),
          ('uri', 'https://www.biorxiv.org/content/early/2017/03/24/118356'),
          ('uri_text', 'preprint on Biorxiv'),
          ('day', '24'),
          ('month', '03'),
          ('year', '2017'),
          ('date', date_struct(2017, 3, 24)),
          ('iso-8601-date', '2017-03-24')
          ])
      ]
  
subject: Change the date key to non-unicode in the test fixture.