generated: '2026-07-19'
method: searched
source: https://flow-ai.com/docs/guides/testing
summary: >-
  flowai-harness ships deterministic test facilities so an agent topology can be
  unit-tested without a live model provider. This is the harness's test-vs-live
  separation: swap the live provider for a deterministic interpreter to exercise the
  runtime, tools, plans, and approvals reproducibly. The Production tier additionally
  provides a hosted sandbox executor.
test_mode:
- name: deterministic interpreters
  description: Two deterministic interpreters that stand in for a live model provider
    so agent topology (tools, plans, executors, approvals) can be unit-tested reproducibly
    without provider calls.
  source: https://flow-ai.com/docs/guides/testing
- name: sandbox executor
  tier: production
  description: Hosted sandbox executor for running agent actions in an isolated environment.
  source: https://flow-ai.com/pricing
notes:
- No live model-provider keys are required to run the deterministic interpreters.
- No published magic test card / IBAN values - this is not a payments provider.