old_contents: """
  With these settings, tests run faster.
  """
  
  from .base import *  # noqa
  from .base import env
  
  # GENERAL
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#debug
  DEBUG = False
  # https://docs.djangoproject.com/en/dev/ref/settings/#secret-key
  SECRET_KEY = env(
      "DJANGO_SECRET_KEY",
      default="!!!SET DJANGO_SECRET_KEY!!!",
  )
  # https://docs.djangoproject.com/en/dev/ref/settings/#test-runner
  TEST_RUNNER = "django.test.runner.DiscoverRunner"
  
  # CACHES
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#caches
  CACHES = {
      "default": {
          "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
          "LOCATION": "",
      }
  }
  
  # PASSWORDS
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#password-hashers
  PASSWORD_HASHERS = ["django.contrib.auth.hashers.MD5PasswordHasher"]
  
  # TEMPLATES
  # ------------------------------------------------------------------------------
  TEMPLATES[0]["OPTIONS"]["loaders"] = [  # noqa F405
      (
          "django.template.loaders.cached.Loader",
          [
              "django.template.loaders.filesystem.Loader",
              "django.template.loaders.app_directories.Loader",
          ],
      )
  ]
  
  # EMAIL
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#email-backend
  EMAIL_BACKEND = "django.core.mail.backends.locmem.EmailBackend"
  # https://docs.djangoproject.com/en/dev/ref/settings/#email-host
  EMAIL_HOST = "localhost"
  # https://docs.djangoproject.com/en/dev/ref/settings/#email-port
  EMAIL_PORT = 1025
  
  # Your stuff...
  # ------------------------------------------------------------------------------
  
new_contents: """
  With these settings, tests run faster.
  """
  
  from .base import *  # noqa
  from .base import env
  
  # GENERAL
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#debug
  DEBUG = False
  # https://docs.djangoproject.com/en/dev/ref/settings/#secret-key
  SECRET_KEY = env(
      "DJANGO_SECRET_KEY",
      default="!!!SET DJANGO_SECRET_KEY!!!",
  )
  # https://docs.djangoproject.com/en/dev/ref/settings/#test-runner
  TEST_RUNNER = "django.test.runner.DiscoverRunner"
  
  # CACHES
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#caches
  CACHES = {
      "default": {
          "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
          "LOCATION": "",
      }
  }
  
  # PASSWORDS
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#password-hashers
  PASSWORD_HASHERS = ["django.contrib.auth.hashers.MD5PasswordHasher"]
  
  # TEMPLATES
  # ------------------------------------------------------------------------------
  TEMPLATES[0]["OPTIONS"]["loaders"] = [  # noqa F405
      (
          "django.template.loaders.cached.Loader",
          [
              "django.template.loaders.filesystem.Loader",
              "django.template.loaders.app_directories.Loader",
          ],
      )
  ]
  
  # EMAIL
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#email-backend
  EMAIL_BACKEND = "django.core.mail.backends.locmem.EmailBackend"
  
  # Your stuff...
  # ------------------------------------------------------------------------------
  
subject: Remove EMAIL_HOST & EMAIL_PORT with locmem backend (#2152)