Took the African/European race one as that's the OG style. As ever it can't find any bias for me. Because it's a skewed test of mental tongue twisters and conditioning resistance, not bias.

It's still disgustingly shady too. It measures exclusively European - bad and African - good pairings for one half, then switches to European - good and African - bad for the other half, when people will obviously improve their sorting speed with practice. They even have a bullshit little disclaimer at the end about minimizing this by randomising which section is first and having a few practice questions at the start, like people stop improving after the first 30 seconds. It would be patently simple to randomise the pairings and eliminate the problem entirely, but they decide to leave a glaring flaw there for unknown reasons.

I also took the test several times and there were always more sections where European-good/African-bad follows a simple repetitive pattern and African-good/European-bad is the point it breaks the repetition, rather than the reverse. So It's ambiguous as to whether the randomisation is weighted toward that or I was just unlucky.