When I've seen it adopted, it was in the context of XP. The red-green-refactor cycle affords a decent flow for pairs, who may switch off between test writing an

When I've seen it adopted, it was in the context of XP. The red-green-refactor cycle affords a decent flow for pairs, who may switch off between test writing and feature writing. I can see that without the other XP practices, pairing may be awkward.