This test was designed to ensure flutter_tester keeps running (previously it would quit immediately). However it's turned out ot be rather flaky and we have new tests on the way that supersede this by actually testing real things (debug stepping, reloading, expression evaluation).
After landing the un-skip this test failed with a timeout. It then passed on the next build (!). I think it's too flaky to leave running until we can better diagnose what's happening.
This test is failing on mac_bot (but passing elsewhere) because flutter-tester is apparently quitting earlier than expected. Locally it fails with an even weirder error and almost all tests are failing with "Compilation failed" (this isn't happening on the builds, so something is bad on my MacBook). Marking as skip to fix build while investigating; there's no real impact of this test not running; it's testing a tool that its itself used for testing (and not currently in any way that should be affected by this failure).