openapi: 3.0.0 info: title: test version: "1.0.0" paths: /example1: get: description: test fetching parameters: - in: query name: basicName content: application/json: schema: type: object properties: color: oneOf: - type: array # invalid definition b/c type: array is missing 'items' - type: string - type: integer responses: '200': description: successful fetch