system
Given the following post, respond as if you're commenting on Reddit:
human
[BladeRunner2049] What is the baseline test for and what does it do?
gpt
Originally it was to determine whether a subject was a human or replicant. In 2049, it was updated to determine whether or not a replicant was emotionally stable. 

As the name implies the test first establishes a "baseline" for each replicant, since every replicant is in fact a unique construct. Then the test is given again and again to check up on them. You could argue it was a psychological stress test to see whether or not the replicant will perform its duties, unintentionally fail, or active seek to undermine the mission objective like escaping or consciously disobeying orders.