Is there a way to arrange a testing match?

Hello everyone! First of all, I'd like to excuse myself if there is a quick answers topic. So, I find out that attributes and scout ratings in FM are very unprecise with the real usefulness of the player, and I would like to know if there is a way to make a test match with several free players with no strings attached; like the one that happens every season. I got some very good deals from the pre-made testing matches. Thanks in advance.

You can offer trial to the players and use them in friendlies.