How to create optional object with required fields?

Hi, is it possible to create the following schema:

yup.object({
  foo: yup.object({
    bar: yup.string().required()
  })
})

where you can either provide foo or not, but if you do, you must provide bar? Running the above schema on {}, I’m getting foo.bar is required

[jquense]

const parent = object({ child: object({ name: string.required() }).default(undefined) })

[jquense]

Objects automatically default there fields which is why its complaining. If you want the object to be optional and empty by default set .default() to null or undefined on the foo object schema