Current tests are unreliable, last two PRs were merged with failing tests

[leafty]

• (FAIL at HEAD main) https://github.com/SwissDataScienceCenter/amalthea/actions/runs/18132389308/job/51602165293
• (FAIL at main -1 commit) https://github.com/SwissDataScienceCenter/amalthea/actions/runs/17802360580/job/50605272525