{
    "description": "Request has a negative audio max bitrate.",

    "mockBidRequest": {
        "id": "some-request-id",
        "site": {
            "page": "test.somepage.com"
        },
        "imp": [{
            "id": "some-imp-id",
            "audio": {
                "mimes": ["audio/mp4"],
                "maxbitrate": -1
            },
            "ext": {
                "prebid": {
                    "bidder": {
                        "appnexus": {
                            "placementId": 12345
                        }
                    }
                }
            }
        }]
    },
    "expectedReturnCode": 400,
    "expectedErrorMessage": "Invalid request: request.imp[0].audio.maxbitrate must be a positive number"
}