performServerTest(router) { expectation in
            self.performRequest("get", path:"/format", callback: {response in
                XCTAssertNotNil(response, "ERROR!!! ClientRequest response object was nil")
                XCTAssertEqual(response?.statusCode, HTTPStatusCode.OK, "HTTP Status code was \(String(describing: response?.statusCode))")
                XCTAssertEqual(response?.headers["Content-Type"]?.first, "text/html")