performServerTest(router) { expectation in
            self.performRequest("get", path: "/subdomains", callback: { response in
                XCTAssertNotNil(response, "ERROR!!! ClientRequest response object was nil")
                XCTAssertEqual(response?.statusCode, HTTPStatusCode.OK, "HTTP Status code was \(String(describing: response?.statusCode))")
                let hostHeader = response?.headers["Host"]?.first