Hi @philipp.coding, I also ran into this issue on the APIs & Microservices projects and found out the tests for the APIs & Microservices projects are not yet implemented according to this forum post and this GitHub issue. Fortunately some awesome people implemented tests for both backend certifications in these two Glitch apps:
- FCC Back-End Tester - narrow-plane - has tests for timestamp, header parser, url shortener, and file metadata
- FCC Back-End Tester - pricey-hugger - has tests for exercise tracker and Info Sec & QA Certification projects