oas 0.2.1

openapi: 3.0.0
info:
  title: Test invalid duplicate parameter
  version: 1.0.0

paths:
  '/test':
    get:
      operationId: same
      parameters:
      - name: test
        in: query
        schema:
          type: string
      - name: test
        in: query
        schema:
          type: integer
      responses:
        '200':
          description: OK