old_contents: DEBUG = True
  
  DATABASE_ENGINE = 'sqlite3'
  
  INSTALLED_APPS = [
              'django.contrib.contenttypes',
              'django.contrib.auth',
              'django.contrib.admin',
              'django.contrib.sessions',
              'object_tools',
              'object_tools.tests',
  ]
  ROOT_URLCONF = 'object_tools.tests.urls'
  
new_contents: DEBUG = True
  
  DATABASE_ENGINE = 'sqlite3'
  
  DATABASES = {
      'default' : {
          'ENGINE': 'django.db.backends.sqlite3',
          'NAME': ':memory:',
      }
  }
  
  INSTALLED_APPS = [
              'django.contrib.contenttypes',
              'django.contrib.auth',
              'django.contrib.admin',
              'django.contrib.sessions',
              'object_tools',
              'object_tools.tests',
  ]
  
  ROOT_URLCONF = 'object_tools.tests.urls'
  
subject: add DATABASES for newer Django