how to set timezone in UnitTest

I see there is a way to set timezone in init()

but how can I set timezone in UnitTest

import os

import pytest
from tortoise.contrib import test
from tortoise.contrib.test import finalizer, initializer

@pytest.fixture(scope="session", autouse=True)
def initialize_tests(request):
    db_url = os.environ.get("TORTOISE_TEST_DB", "sqlite://:memory:")
    initializer(['app.models.models'], db_url=db_url, app_label="models")
    request.addfinalizer(finalizer)

Start with the pytest fixture shown in the issue and inspect the tortoise.contrib.test initializer and finalizer entry points. Determine whether timezone configuration is supported during this test setup, then document the supported way to configure it and verify the example works.