[huntedsnark]

The slowest part of most tests suites are the integration and acceptance tests. Regardless of how decoupled my actual domain logic is, these will usually be the bottleneck, so I can't really agree with slow tests always being a symptom of some underlying architecture problem.

[regularfry]

Yes, but you don't run those all the time. It's the unit tests that have to be fast, and if they aren't, that's a problem.