self = <oioioi.oi.tests.TestOIRegistration testMethod=test_default_terms_accepted_phrase>

    def test_default_terms_accepted_phrase(self):
        TermsAcceptedPhrase.objects.get().delete()
        contest = Contest.objects.get()
        url = reverse('participants_register',
                      kwargs={'contest_id': contest.id})

        self.assertTrue(self.client.login(username='test_user'))
        response = self.client.get(url)

>       self.assertContains(response, 'terms accepted')

oioioi/oi/tests.py:170:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
../venv/lib/python2.7/site-packages/django/test/testcases.py:393: in assertContains
    self.assertTrue(real_count != 0, msg_prefix + "Couldn't find %s in response" % text_repr)
E   AssertionError: Couldn't find 'terms accepted' in response
------------------------------ Captured log call -------------------------------
WARNING  django.template:loader_tags.py:232 Exception raised while rendering {% include %} for template 'participants/registration.html'. Empty string rendered instead.
Traceback (most recent call last):
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/loader_tags.py", line 216, in render
    return template.render(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/base.py", line 209, in render
    return self._render(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/test/utils.py", line 107, in instrumented_test_render
    return self.nodelist.render(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/base.py", line 990, in render
    bit = node.render_annotated(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/base.py", line 957, in render_annotated
    return self.render(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/defaulttags.py", line 216, in render
    nodelist.append(node.render_annotated(context))
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/base.py", line 957, in render_annotated
    return self.render(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/defaulttags.py", line 322, in render
    return nodelist.render(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/base.py", line 990, in render
    bit = node.render_annotated(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/base.py", line 957, in render_annotated
    return self.render(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/base.py", line 1040, in render
    output = self.filter_expression.resolve(context)
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/template/base.py", line 736, in resolve
    new_obj = func(obj, *arg_vals)
  File "/home/hayven/Pulpit/sio2/oioioi/oioioi/base/templatetags/simple_filters.py", line 98, in add_class
    return value.as_widget(attrs={'class': css_classes_str.strip()})
  File "/home/hayven/Pulpit/sio2/venv/lib/python2.7/site-packages/django/forms/boundfield.py", line 127, in as_widget
    **kwargs
  File "/home/hayven/Pulpit/sio2/oioioi/oioioi/oi/forms.py", line 39, in render
    raise AssertionError
AssertionError