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yuneng-jiangandGitHub
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The Redis-backed VCR layer was recording and replaying the Google OAuth2/STS token-mint call. The replayed ya29.* access token is long-expired, but its recorded expires_in keeps credentials.expired False, so litellm never refreshes it and sends the stale token to a live Vertex/Gemini endpoint, which returns 401 ACCESS_TOKEN_EXPIRED. This broke live partner-model tests whose completion call is not itself cassette-backed (e.g. test_vertex_ai_llama_tool_calling). Force credential-exchange hosts to pass through live (never recorded, never replayed) by returning None from before_record_request, mirroring the existing telemetry passthrough, so a fresh token is minted each run. Regression from #28826, which added OAuth-token matcher tolerance plus TTL-refresh-on-read so a stale token episode matched and never expired.
In total litellm runs 1000+ tests
[02/20/2025] Update:
To make it easier to contribute and map what behavior is tested,
we've started mapping the litellm directory in tests/test_litellm
This folder can only run mock tests.