Keep initial data in database after migration test

I am using django-test-migrations with pytest. My project depends on some initial data migration. After a migration test runs (using the `migrator` fixture) it seems my initial data is gone. I tried to set `@pytest.mark.django_db(transaction=True, serialized_rollback=True)`, but the migrator does not seem to respect the `serialized_rollback` option. Is there another way to keep the initial data? EDIT: I re-opened the issue as I am pretty sure now that it is an issue with django-test-migrations.