Killing spid's or processes on a sql server from the

I often restore a version of a prod database on top of a test database.  Many times the test database will have active connections that i kill off with the activity monitor in ssms. (allowing the restore to proceed)  Would putting the database in single-user mode offer me the same results of killing all active connections.  what are the risks of putting it in single user mode?

proposed steps.  

put test database in single-user mode
restore production database to the test database.

will the test database be in single user mode after the restore.