public async Task CreateSpecificationDatasetRelationship()
        {
            string specificationId = NewRandomString();
            string datasetId       = NewRandomString();

            await AssertPutRequest($"specifications/{specificationId}/relationships/datasets/{datasetId}",
                                   HttpStatusCode.OK,
                                   () => _client.UpsertSpecificationDatasetRelationship(specificationId, datasetId));
        }