Sugiro a criação do método `setUp` para acomodar a preparação do objeto `DummyRequest`.

```python
def setUp(self):
    req = testing.DummyRequest()
    req.registry.settings = {'http_server': {'version': 'v1'}}
    req.params = {'limit': 20, 'offset': 0}
    req.db = ObjectStub()
    req.db.query = QueryStub
    req.db.query.model = AttemptStub
    req.db.query.found = True

    self.req = req
```