public async Task DownloadFileFromS3() { const string downloadUrl = "s3://css-invoice-payment-advices/e3a7a11a-e23b-477a-a058-f83ad9b827b7"; byte[] data = await S3.DownloadFileAsync(downloadUrl).ConfigureAwait(false); Assert.AreNotEqual(0, data.Length, "Downloaded file is blank"); }