test_settings.py

# -*- coding: utf-8 -*-
import django

SECRET_KEY = 'not_empty'
SITE_ID = 1

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': ':memory:',
    }
}

ROOT_URLCONF = 'test_urls'

if django.VERSION >= (1, 8):
    TEMPLATES = [
        {
            'BACKEND': 'django.template.backends.django.DjangoTemplates',
            'DIRS': [],
            'APP_DIRS': True,
            'OPTIONS': {
                'context_processors': [
                    'django.template.context_processors.debug',
                    'django.template.context_processors.request',
                    'django.contrib.auth.context_processors.auth',
                    'django.contrib.messages.context_processors.messages'
                ],
            },
        },
    ]
else:
    TEMPLATE_CONTEXT_PROCESSORS = (
        "django.contrib.auth.context_processors.auth",
        "django.core.context_processors.debug",
        "django.core.context_processors.i18n",
        "django.core.context_processors.media",
        "django.core.context_processors.static",
        "django.core.context_processors.request",
        "django.contrib.messages.context_processors.messages",
    )

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

EMAIL_BACKEND = 'django.core.mail.backends.locmem.EmailBackend'

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.admin',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'tests',
    'invitations',
)
AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend',
)