So, how does one "test" for pbe?

So, i've been playing on the pbe for like 2 weeks now. I always seem to go with what would be the most meta rune for a certain champion. Is there anything specific one person on the PBE should be doing for testing, or is just playing with the runes, finding bugs(like the Kayn and the shop one), and combining different champions and runes for possible bugs? I appreciate all the help. Sorry if my english is garbo, i'm really sleepy rn.
Report as:
Offensive Spam Harassment Incorrect Board