new_contents: import pytest
  from datetime import datetime, timedelta
  from django.test import TestCase
  
  from molo.core.models import ArticlePage
  
  
  @pytest.mark.django_db
  class TestModels(TestCase):
      fixtures = ['molo/core/tests/fixtures/test.json']
  
      def test_article_order(self):
          now = datetime.now()
          article1 = ArticlePage.objects.get(pk=7)
          article1.first_published_at = now
          article1.save()
  
          article2 = ArticlePage.objects.get(pk=8)
          article2.first_published_at = now + timedelta(hours=1)
          article2.save()
  
          # most recent first
          self.assertEquals(
              ArticlePage.objects.live()[0].title, article2.title)
  
          # swap published date
          article1.first_published_at = now + timedelta(hours=4)
          article1.save()
  
          self.assertEquals(
              ArticlePage.objects.live()[0].title, article1.title)
  
subject: add failing test