@redocly/openapi-core/src/__tests__/fixtures/refs/external-request-body.yaml

See https://github.com/Redocly/redocly-cli

openapi: 3.0.0
paths:
  /pet:
    post:
      requestBody:
        content:
          application/json:
            schema:
              $ref: ./requestBody.yaml
components:
  schemas:
    requestBody:
      $ref: ./requestBody.yaml