You could :
Ask for a wild card cert for *.example.com & example.com" and place the obtained certificate on the two servers 172.65.1.11 and 172.65.1.10.
Or you can ask for two certs : a cert for the server test.example.com, to be put on server 172.65.1.10 and a cert for test2.example.com, to be put on 172.65.1.11.
Btw : certs are totally not aware of IP's and stuff like that.
If your server test2.example.com uses IP 192.168.1.10 as of now , the cert will still works just fine.