old_contents: from decimal import Decimal
  from uuid import uuid4
  
  import pytest
  from django.utils.timezone import now
  from rest_framework.reverse import reverse
  from rest_framework import status
  
  from testapp.models import MyTestModel
  
  pytestmark = pytest.mark.django_db
  
  
  @pytest.fixture
  def my_test_model_data():
      return {
          'charfield': 'charfield',
          'datefield': now().date().isoformat(),
          'datetimefield': now(),
          'decimalfield': Decimal('100.00'),
          'floatfield': float(100.00),
          'integerfield': 100,
          'timefield': now().time(),
          'uuidfield': uuid4()
      }
  
  
  def test_create(client, my_test_model_data):
      url = reverse('testapp:mytestmodel-list')
  
      response = client.post(url, my_test_model_data, format='json')
      assert response.status_code == status.HTTP_201_CREATED
      for field in my_test_model_data:
          assert field in response.data
  
  
  def test_list(client, my_test_model_data):
      url = reverse('testapp:mytestmodel-list')
      MyTestModel.objects.create(**my_test_model_data)
  
      response = client.get(url, format='json')
      assert len(response.data) == 1
      for field in my_test_model_data:
          assert field in response.data[0]
  
new_contents: import pytest
  from rest_framework.reverse import reverse
  from rest_framework import status
  
  from testapp.models import MyTestModel
  
  pytestmark = pytest.mark.django_db
  
  
  @pytest.fixture
  def my_test_model_data():
      return {
          'charfield': 'charfield',
          'datefield': '2017-01-01',
          'datetimefield': '2017-01-01T00:00:00Z',
          'decimalfield': '100.00',
          'floatfield': 100.00,
          'integerfield': 100,
          'timefield': '00:00:00',
          'uuidfield': '6293fec0-6323-4e99-ad42-327b407ffd0f'
      }
  
  
  def test_create(client, my_test_model_data):
      url = reverse('testapp:mytestmodel-list')
  
      response = client.post(url, my_test_model_data, format='json')
      assert response.status_code == status.HTTP_201_CREATED
      for field in my_test_model_data:
          assert response.data[field] == my_test_model_data[field]
  
  
  def test_list(client, my_test_model_data):
      url = reverse('testapp:mytestmodel-list')
      MyTestModel.objects.create(**my_test_model_data)
  
      response = client.get(url, format='json')
      assert response.status_code == status.HTTP_200_OK
      assert len(response.data) == 1
      for field in my_test_model_data:
          assert response.data[0][field] == my_test_model_data[field]
  
subject: Improve tests