Django 1.5 DeletionMixin with lazy success_url value

(djtest1.5)Trinity:tests kelvin$ PYTHONPATH=..:$PYTHONPATH python3.2 ./runtests.py --settings=test_sqlite generic_views
/Users/kelvin/repos/github_kw/django-kelvin/django/contrib/databrowse/__init__.py:5: DeprecationWarning: The Databrowse contrib app is deprecated
  warnings.warn("The Databrowse contrib app is deprecated", DeprecationWarning)

Creating test database for alias 'default'...
Creating test database for alias 'other'...
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ERROR: test_delete_with_lazy_redirect (regressiontests.generic_views.edit.DeleteViewTests)
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Traceback (most recent call last):
  File "/Users/kelvin/repos/github_kw/django-kelvin/tests/regressiontests/generic_views/edit.py", line 288, in test_delete_with_lazy_redirect
    res = self.client.post('/edit/author/%d/delete/lazy_redirect/' % a.pk)
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/test/client.py", line 463, in post
    response = super(Client, self).post(path, data=data, content_type=content_type, **extra)
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/test/client.py", line 297, in post
    return self.request(**r)
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/test/client.py", line 424, in request
    six.reraise(*exc_info)
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/utils/six.py", line 550, in reraise
    raise value
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/core/handlers/base.py", line 113, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/views/generic/base.py", line 68, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/views/generic/base.py", line 86, in dispatch
    return handler(request, *args, **kwargs)
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/views/generic/edit.py", line 250, in post
    return self.delete(*args, **kwargs)
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/views/generic/edit.py", line 246, in delete
    return HttpResponseRedirect(self.get_success_url())
  File "/Users/kelvin/repos/github_kw/django-kelvin/django/http/response.py", line 388, in __init__
    parsed = urlparse(redirect_to)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/urllib/parse.py", line 292, in urlparse
    url, scheme, _coerce_result = _coerce_args(url, scheme)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/urllib/parse.py", line 112, in _coerce_args
    return _decode_args(args) + (_encode_result,)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/urllib/parse.py", line 96, in _decode_args
    return tuple(x.decode(encoding, errors) if x else '' for x in args)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/urllib/parse.py", line 96, in <genexpr>
    return tuple(x.decode(encoding, errors) if x else '' for x in args)
AttributeError: '__proxy__' object has no attribute 'decode'

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Ran 160 tests in 7.456s

FAILED (errors=1, expected failures=1)
Destroying test database for alias 'default'...
Destroying test database for alias 'other'...
(djtest1.5)Trinity:tests kelvin$