```python
from starlette.applications import Starlette
from starlette.middleware import Middleware
-from starlette.middleware.session import SessionMiddleware
+from starlette.middleware.sessions import SessionMiddleware
from starlette.routing import Route
from myproject import settings
from starlette.config import environ
from starlette.testclient import TestClient
from sqlalchemy import create_engine
-from sqlalchemy_utils import database_exists, create_database
+from sqlalchemy_utils import create_database, database_exists, drop_database
# This line would raise an error if we use it after 'settings' has been imported.
environ['TESTING'] = 'TRUE'