In test_sensitive_header_passthrough_with_pii_span_streaming, use if expected is None instead of if request.node.callspec.id == "data_collection_off_does_not_add_headers". If the parametrize ID is ever renamed, the intended branch is silently skipped and the else branch runs expected["authorization"] on None, raising a TypeError. Keying on the semantically-meaningful expected value is more robust.