I may be wrong but with the new client, there isnt a way for me to add bots to custom games.

I play bots a lot to test out if my connection is stable enough to play with real people. I dont want to ruin anyone's experience when it comes to LOL because you're ruining the game for the other 9 people that want to experience teamwork or a challenge. I cannot seem to find a way to add bots in custom games in the new client though.