conftest.py

def pytest_configure():
    from django.conf import settings

    settings.configure(
        DEBUG_PROPAGATE_EXCEPTIONS=True,
        DATABASES={
            "default": {
                "ENGINE": "django.db.backends.sqlite3",
                "NAME": ":memory:",
            }
        },
        SITE_ID=1,
        SECRET_KEY="not very secret in tests",
        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.common.CommonMiddleware",
            "django.contrib.sessions.middleware.SessionMiddleware",
            "django.middleware.csrf.CsrfViewMiddleware",
            "django.contrib.auth.middleware.AuthenticationMiddleware",
            "django.contrib.messages.middleware.MessageMiddleware",
        ),
        INSTALLED_APPS=(
            "django.contrib.auth",
            "django.contrib.contenttypes",
            "django.contrib.sessions",
            "django.contrib.sites",
            "django.contrib.messages",
            "django.contrib.staticfiles",
            "rest_framework",
            "rest_framework.authtoken",
            "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",
        ),
    )

    try:
        import oauth_provider  # NOQA
        import oauth2  # NOQA
    except ImportError:
        pass
    else:
        settings.INSTALLED_APPS += ("oauth_provider",)

    try:
        import provider  # NOQA
    except ImportError:
        pass
    else:
        settings.INSTALLED_APPS += (
            "provider",
            "provider.oauth2",
        )

    # guardian is optional
    try:
        import guardian  # NOQA
    except ImportError:
        pass
    else:
        settings.ANONYMOUS_USER_ID = -1
        settings.AUTHENTICATION_BACKENDS = (
            "django.contrib.auth.backends.ModelBackend",
            "guardian.backends.ObjectPermissionBackend",
        )
        settings.INSTALLED_APPS += ("guardian",)

    try:
        import django

        django.setup()
    except AttributeError:
        pass