_Why_ does my test pass, when there's no `owner` filtering??

gistfile1.py

from django.conf import settings
from django.db import models
from django.utils.timezone import now


class Doable(models.Model):
    short_description = models.CharField(max_length=120)
    owner = models.ForeignKey(settings.AUTH_USER_MODEL)

tests.py

from django.contrib.auth import get_user_model
from django.test import TestCase
from rest_framework.test import (
    APIClient,
    APIRequestFactory,
)
from ..models import *  # noqa
import json


class TestAPI(TestCase):
    def setUp(self):
        self.factory = APIRequestFactory()
        self.api_client = APIClient()

        self.userA_password = "password"
        self.userA = get_user_model().objects.create(username="A", password=self.userA_password)
        self.userB_password = "password2"
        self.userB = get_user_model().objects.create(username="B", password=self.userB_password)

        self.doableA_short = "Lorem Ipsum"
        self.doableA = Doable.objects.create(
            short_description=self.doableA_short,
            owner=self.userA,
        )
        self.doableB_short = "Dolor Sit Amet"
        self.doableB = Doable.objects.create(
            short_description=self.doableB_short,
            owner=self.userB,
        )

    def test_getting_doables(self):
        self.api_client.login(username=self.userA.username, password=self.userA_password)

        response = self.api_client.get('/api/doables/')

        doables = json.loads(response.content)

        self.assertEquals(len(doables), 1)

        self.assertEquals(doables[0]['short_description'], self.doableA_short)

urls.pu

from django.conf.urls import url

from .views import *  # noqa

urlpatterns = (
    url(r'api/doables/$', DoablesView.as_view()),
)

views.py

from rest_framework import generics

from .models import *  # noqa
from .serializers import *  # noqa


class DoablesView(generics.ListCreateAPIView):
    queryset = Doable.objects.all()
    serializer_class = DoableSerializer