          self.assertEquals(serializer.errors, {'target': [u'Value may not be null']})
  
  
  class HyperlinkedNullableForeignKeyTests(TestCase):
      urls = 'rest_framework.tests.hyperlink_relations'
  
      def setUp(self):
          target = ForeignKeyTarget(name='target-1')
          target.save()
          for idx in range(1, 4):
 
</s> remove     urls = 'rest_framework.tests.hyperlink_relations'
 </s> add     urls = 'rest_framework.tests.relations_hyperlink' </s> remove     urls = 'rest_framework.tests.hyperlink_relations'
 </s> add     urls = 'rest_framework.tests.relations_hyperlink'
    urls = 'rest_framework.tests.relations_hyperlink'
          self.assertEquals(serializer.errors, {'target': [u'Value may not be null']})
  
  
  class HyperlinkedNullableForeignKeyTests(TestCase):
    urls = 'rest_framework.tests.relations_hyperlink'
  
      def setUp(self):
          target = ForeignKeyTarget(name='target-1')
          target.save()
          for idx in range(1, 4):
keep keep keep keep replace keep keep keep keep keep
 Fix up test url model now filename has changed 
rest_framework/tests/relations_hyperlink.py