How can I override `_GLOBAL_DEFAULT_TIMEOUT` used by a third party library?

Question

I am using tavern to test python flask application. Occasionally, I got http connection errors like:

for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
    af, socktype, proto, canonname, sa = res
    sock = None
    try:
        sock = socket.socket(af, socktype, proto)

        # If provided, set socket level options before connecting.
        _set_socket_options(sock, socket_options)

        if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
            sock.settimeout(timeout)
        if source_address:
            sock.bind(source_address)
>       sock.connect(sa)
E       **ConnectionRefusedError: [Errno 111] Connection refused**

One possible reason is that the connection is timed out so I'd like to change the timeout for http connection used by tavern. I can't find a configuration from tavern for changing this value but based on the source code above, it seems that the default timeout is read from socket._GLOBAL_DEFAULT_TIMEOUT. How can I change this value from my app? I don't call this connection method directly which is called by Tavern framework. Is there a way to update it from my app side? I am using pytest to run the test so it is also good if I can set something on pytest to override this value.