The test view is on the Duolingo English Test (DET), an alternative online English proficiency test with a machine-driven characteristic. The review covers essential information of the DET such as test purpose, usage, score-mapping with CEFR scale, price, and publisher. Meanwhile, the test usefulness is discussed with focuses on reliability, content validity, and impact. Both good points and weaknesses are illustrated. Furthermore, the view tries to criticize the AI algorithm issues in test content and score rating.