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Julio Quinteros Pro
2d41b03f8b
The test test_proxy_config_state_post_init_callback_call was failing with: ``` ValidationError: 2 validation errors for TeamCallbackMetadata callback_vars.langfuse_public_key Input should be a valid string [type=string_type, input_value=None, input_type=NoneType] ``` Root cause: The test uses environment variable references like "os.environ/LANGFUSE_PUBLIC_KEY" which get resolved at runtime. In parallel execution with --dist=loadscope, these environment variables may not be set in all worker processes, causing the resolution to return None, which fails Pydantic validation expecting strings. Solution: Use monkeypatch to set the required environment variables before the test runs. This ensures consistent behavior across all test execution environments (local, CI, parallel workers). Fixes test failure exposed by PR #21277. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>