For other people who are interested as myself, I looked up "Enneagram test" on Wikipedia. The intro concludes with:
> There has been limited formal psychometric analysis of the Enneagram and the peer-reviewed research that has been done has not been widely accepted within the relevant academic communities.[5] Though the Enneagram integrates concepts generally accepted in a theory of personality,[6] it has been dismissed as pseudoscience by some personality assessment experts and called "pseudoscientific at best".[7]