SSH STRONG-CRYPTO

Under Ip ssh I set Stron-crypto=Enable and set host-key-size=2048
I then regenerated my host key.
According to the literature this is meant to disable MD5. When I logon using ssh it tells me there is a new key I can save and accept. (MD5) If I run a check using SSH test it shows issues. I would like to make the ssh more secure any ideas. I already have other controls in place to prevent brute force this is just one more level.