{
  "mockBidRequest": {
    "id": "test-request-id",
    "imp": [
      {
        "id": "test-imp-id",
        "banner": {
          "format": [{"w": 320, "h": 50}]
        },
        "ext": "badExt"
      }
    ]
  },

  "expectedMakeRequestsErrors": [
    {
      "value": "imp test-imp-id: unable to unmarshal ext",
      "comparison": "literal"
    }
  ]
}