old_contents: """
  Settings for the test suite
  """
  
  from .base import *
  
new_contents: """
  Settings for the test suite
  """
  
  from .base import *
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.sqlite3',
          'NAME': ':memory:',
      }
  }
  
subject: Use in-memory sqlite db for testing.