Test running problems

gistfile1.txt

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ERROR: test_initial_behavior (geonode.base.tests.ThumbnailTests)
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Traceback (most recent call last):
  File "/home/travis/Documents/Development/Git/geonode-community/geonode/geonode/base/tests.py", line 31, in setUp
    super(ThumbnailTests, self).setUp()
  File "/home/travis/Documents/Development/Git/geonode-community/geonode/geonode/tests/base.py", line 79, in setUp
    self.get_obj_ids = create_models(type=self.get_type)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode/geonode/base/populate_test_data.py", line 230, in create_models
    m.save()
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/polymorphic/models.py", line 93, in save
    return super(PolymorphicModel, self).save(*args, **kwargs)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/django/db/models/base.py", line 808, in save
    force_update=force_update, update_fields=update_fields)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/django/db/models/base.py", line 848, in save_base
    update_fields=update_fields, raw=raw, using=using,
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 193, in send
    for receiver in self._live_receivers(sender)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode/geonode/documents/models.py", line 211, in create_thumbnail
    create_document_thumbnail.delay(object_id=instance.id)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/app/task.py", line 408, in delay
    return self.apply_async(args, kwargs)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/app/task.py", line 519, in apply_async
    link=link, link_error=link_error, **options)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/app/task.py", line 734, in apply
    propagate=throw, app=self._get_app(),
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/app/trace.py", line 295, in build_tracer
    backend = task.backend
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/app/task.py", line 992, in backend
    return self.app.backend
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/kombu/utils/objects.py", line 44, in __get__
    value = obj.__dict__[self.__name__] = self.__get(obj)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/app/base.py", line 1196, in backend
    return self._get_backend()
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/app/base.py", line 915, in _get_backend
    return backend(app=self, url=url)
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/backends/filesystem.py", line 55, in __init__
    self._do_directory_test(b'.fs-backend-' + uuid().encode(encoding))
  File "/home/travis/Documents/Development/Git/geonode-community/geonode-env/local/lib/python2.7/site-packages/celery/backends/filesystem.py", line 70, in _do_directory_test
    raise ImproperlyConfigured(E_PATH_INVALID)
ImproperlyConfigured: The configured path for the file-system backend does not
work correctly, please make sure that it exists and has
the correct permissions.