Permissions not working

Hi ,
   I am having some problems with setting up permissions in Postgres. I 
have a database for ex: 'ups' and it was owned previously by 
'postgres(superuser)' but now i have changed the ownership to new user 
'ups' all the tables are owned by these user 'ups'. This database doesnt 
have any schemas except for 'Public'. I have created another user lets 
say 'test' and i didnt give 'test' user any permissions to access the 
tables owned by 'ups' but still when i login to 'ups' database as  psql 
ups  test and run a select on the  tables owned by 'ups' database  it 
goes through.  I dont want  user 'test' to access any tables from the 'ups' 
database, i tried revoking permissions it still doesnt work. Can anyone 
tell me what is wrong here ?
Appreciate your help.

Thanks!
Pallav