conftest.py

from django.conf import settings

def pytest_configure():
    settings.configure(
        DEBUG_PROPAGATE_EXCEPTIONS=True,
        DATABASES={'default': {'ENGINE': 'django.db.backends.sqlite3',
                               'NAME': ':memory:'}},
        SECRET_KEY='Testing Testing',
        USE_I18N=True,
        USE_L10N=True,
        STATIC_URL='/static/',
        ROOT_URLCONF='tests.urls',
        TEMPLATE_LOADERS=(
            'django.template.loaders.filesystem.Loader',
            'django.template.loaders.app_directories.Loader',
        ),
        MIDDLEWARE_CLASSES=(
            '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',
        ),
        INSTALLED_APPS=(
            'django.contrib.admin',
            'django.contrib.auth',
            'django.contrib.contenttypes',
            'django.contrib.sessions',
            'django.contrib.sites',
            'django.contrib.messages',
            'django.contrib.staticfiles',
            'rest_framework',
            'emailuser',
            'tests',
        ),
        PASSWORD_HASHERS=(
            'django.contrib.auth.hashers.SHA1PasswordHasher',
            'django.contrib.auth.hashers.PBKDF2PasswordHasher',
            'django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher',
            'django.contrib.auth.hashers.BCryptPasswordHasher',
            'django.contrib.auth.hashers.MD5PasswordHasher',
            'django.contrib.auth.hashers.CryptPasswordHasher',
        ),
        REST_FRAMEWORK = {
            'DEFAULT_AUTHENTICATION_CLASSES': [
                'rest_framework.authentication.BasicAuthentication',
                'rest_framework.authentication.SessionAuthentication',
            ],
            'TEST_REQUEST_DEFAULT_FORMAT': 'json',
        },
        AUTH_USER_MODEL='emailuser.EmailUser',
    )