How do you test AI features in Rails with RSpec?

Use VCR for recordings, WebMock for stubs. Test shapes, lengths, schemas—not exact text.

What's the best way to handle non-deterministic AI outputs?

Stub units, cassette integrations. Add error stubs for 429s, timeouts.

Yes—records once, replays free. Filter keys, set record: :once.

AI features in Rails sound cool until tests flake out. Here's how RSpec tames the chaos with smart, no-nonsense strategies.

theAIcatchup Apr 11, 2026 3 min read

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#OpenAI stubs #RSpec AI #RSpec VCR #Rails AI testing #Rails testing #VCR WebMock #VCR cassettes #non-deterministic tests

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