import ssl
import socket

def test_ssl_certificate():
    hostname = "127.0.0.1"
    port = 443
    context = ssl.create_default_context()
    with socket.create_connection((hostname, port)) as sock:
        with context.wrap_socket(sock, server_hostname=hostname) as ssock:
            cert = ssock.getpeercert()
            assert cert is not None, "No SSL certificate found!"