You might have the test on the same day, but there's something missing! i.e. your test invite is missing
I have my test at 10 am and my oath at 130pm.
Also, my oath is conditioned on passing test+interview.
So, don't just show up at 130. Better to clarify with whats going on first.
EDIT: just wait to receive your invite, there will probably be both test+ oath invite in the same communication