oas 0.2.1

openapi: 3.0.0
info:
  title: Test valid external $ref of PathItem
  version: 1.0.0

servers:
- url: https://acme.com/api/v1

paths:
  /test:
    $ref: '../resources/include.yaml#/paths/~1test'
  /test2:
    $ref: '../resources/include.yaml#/paths/~1'