GitHub SSH Config: "Bad configuration option: IdentifyFile"

I'm trying to create a .ssh/config file for multiple SSH accounts (specifically for github.com). I've tried several tutorials and github help walk-throughs but nothing seems to work.

I created a id_rsa_test and id_rsa_test.pub. I uploaded id_rsa_test.pub to github.

I then created a ~/.ssh/config file with the following:

# github accountHost github.com-test github.com    Hostname github.com    User git     IdentifyFile ~/.ssh/id_rsa_test

and

# github accountHost github.com-test github.com    Hostname github.com    User git     IdentifyFile ~/.ssh/id_rsa_test.pub

I then try several commands. i.e.:

git clone git@github-test:username/my_project.gitgit push

...everytime I get the following error:

/home/username/.ssh/config: line 5: Bad configuration option: IdentifyFile/home/username/.ssh/config: terminating, 1 bad configuration optionsfatal: The remote end hung up unexpectedly

Any suggestions?