Do i run the test longer then the fina???

I am startin my cycle in a few weeks cyp/tren peopel say i should always run the test at least 2 weeks passed the fina what gives????? does it really make a difference????
cycle is
weeks 1-10 cyp 600mg/week
weeks 3-10 tren 100mg eod or should it be weeks 1-8 tren 100mg eod

yes run the test 2 weeks past the tren to help with recovery.

just like BodyMechanic says, run 2 weeks longer.