openapi: 3.0.3 info: title: oneOf with array inside version: 1.0.0 servers: - url: / paths: /myExample: get: responses: "200": content: application/json: schema: $ref: '#/components/schemas/_myExample_get_200_response' description: Response x-accepts: - application/json components: schemas: OneOf1: example: message1: message1 properties: message1: type: string type: object _myExample_get_200_response: oneOf: - items: $ref: '#/components/schemas/OneOf1' type: array - $ref: '#/components/schemas/OneOf1'