I’ve been able to use the PhantomJS debugger to set and catch a debugger statement in the first test that runs slow, after the first ~160 instantaneous tests finish. It does seem to be failing with a test timeout, although:
- The test code itself appears to step through without any delays
- No timeout errors are reported via testem/ember test
It seems like one of the runner layers (phantom, testem, ember) is waiting before it starts to run these failing tests.