I’ve completed the entry task for System Tests Improvements.
What I did: Added the heat-exchanger-simplified tutorial to the system tests (new suite heat_exchanger_simplified_test in tests.yaml) and fixed Docker/Ubuntu 24.04 compatibility so the suite runs locally. Build and the coupled run complete; it only fails at field comparison because the reference archive for the new case isn’t generated yet (expected). The reference can be generated in CI or by a maintainer.
Happy to update anything based on feedback.