246430bc8c
This change ensures that DDC tests won't accidentally "pass", and then silently fail or timeout later, when the async tests actually run. Change-Id: Id18d3343e5dadcf266f39568a93381daf4c54e1c Reviewed-on: https://dart-review.googlesource.com/c/92247 Reviewed-by: Mark Zhou <markzipan@google.com> Reviewed-by: Vijay Menon <vsm@google.com> Commit-Queue: Jenny Messerly <jmesserly@google.com>