 
 class ControllerTests: XCTestCase {
     func appleSSLClient(to host: String, port: UInt16, message: Data) throws {
+        #if os(macOS)
         let queue = DispatchQueue(label: "test")
         
         let clientSocket = try TCP.Socket()

import HTTP
import Crypto
import Bits

        }
        
        SSL.start(on: queue)
        #endif
    }
    
    func openSSLClient(to host: String, port: UInt16, message: Data) throws {
