Error establishing localhost for testing in python3

My Goal:

1. Start a local host server at example port 3000 (or 8000)
2. Do a get request to check if the website is available
3. Stop the localhost server from running for lets say 5 seconds
4. Start the same localhost port again and check the status of it

What I have tried:

TEST CLASS

class MyTestCase(unittest.TestCase):
    def test_something(self):
        server = Server()
        threading.Thread(target=server.create_server, daemon=True).start()
        server.shutdown()
        try:
            requests.get('http://localhost:8090/')
        except Exception as e:
            raise SystemExit(e)

SERVER CLASS:

class Server():
    def __init__(self):
        self.httpd = None

    def shutdown(self):
        self.httpd.shutdown()

    def create_server(self):
        PORT = 8090
        Handler = http.server.SimpleHTTPRequestHandler

        with socketserver.TCPServer(("", PORT), Handler) as self.httpd:
            print("serving at port", PORT)
            print(self.httpd)
            self.httpd.serve_forever()
            print('never reaches this point')

My issue: Currently, my code is not able to shutdown the server. And I want to shut down the server at some point in time. I've tried server.shutdown() & server.socket().close(). However it still does not seem to work...

Thank you in advance!