I have opened both doors to enter the test chamber but I have no idea where to go from there. I've searched the whole 4th floor in circles but have ended up confusing myself. Can anyone help me figure out how to get to the boss on this level?

oh my god I was stuck here forever too mustve done 6 laps around that bastard level

after you open both doors you should be able to jump over the ledge

i have zero fucking clue how to jump, eventually after spamming roll, attack, sprinting etc, it finally let me jump over the cliff

Glad you figured it out. I remembered way after that it showed that mechanic once at the very beginning of the game but it wasn't implemented so much as to be remembered