old_contents: """
  django-analytical testing settings.
  """
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.sqlite3',
          'NAME': ':memory:',
      }
  }
  
  INSTALLED_APPS = [
      'analytical',
  ]
  
new_contents: """
  django-analytical testing settings.
  """
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.sqlite3',
          'NAME': ':memory:',
      }
  }
  
  INSTALLED_APPS = [
      'analytical',
  ]
  
  SECRET_KEY = 'testing'
  
subject: Add SECRET_KEY to the test settings.