It also says "Passed: 0".

I probably got wooshed here. Anyway, the tests definitely aren't run. I checked it out and tried myself. The test script [1] outputs "ALL SEEDS PASSED!" when the number of failures is zero, which of course is the case if the entire thing just fails to run.

[1] https://github.com/vjeux/pokemon-showdown-rs/blob/605247d012...