League of Legends patcher and client visual updates teased, Riot currently testing on PBE - Neoseeker

This is going to be awesome

League of Legends Upcoming PBE Patch Preview (13.24b) - Mobalytics

Surrender at 20: 9/4 PBE Update: Skin Tweaks & Continued TFT Testing

Riot targeting ranged support meta, snowballing junglers in early

VPBE, League of Legends Wiki

Surrender at 20: 4/20 PBE Update: Splash Art, Continued TFT

League client update] Briefly visiting the PBE for a pre-alpha

Surrender at 20: 8/11 PBE Update: Invasion enabled for testing

VPBE, League of Legends Wiki

Surrender at 20: Current PBE Changes

VPBE, League of Legends Wiki

On PBE we submit most of the bugs that end up being a problem on

VPBE, League of Legends Wiki