openapi: 3.0.3
info:
  title: Validate-test schema-3-1-keyword-in-3-0
  version: 1.0.0
paths:
  /thing:
    get:
      responses:
        "200":
          description: ok
          content:
            application/json:
              schema:
                type: object
                properties:
                  name:
                    type: string
                    const: "fixed"
