How to mock HTTP requests with Alamofire and Quick

I'm trying to mock HTTP requests in my Quick test case. In order to do so I've adjusted a couple of things. I subclassed the QuickSpec to add loading functionality in my test cases like so:

HTTPMocks.swift

import Foundation

class HTTPMocks: NSURLProtocol {
    override class func canInitWithRequest(request: NSURLRequest) -> Bool {
        println("############################")
        return true
    }

    override class func canonicalRequestForRequest(request: NSURLRequest) -> NSURLRequest {
        return request
    }

    override class func requestIsCacheEquivalent(a: NSURLRequest, toRequest b: NSURLRequest) -> Bool {
        return a.URL == b.URL
    }

    override func startLoading() {
        println("WHAT ")
    }
}

CSpec.swift

class CSpec: QuickSpec {
    override class func initialize(){
        super.initialize()

        struct Static {
            static var token: dispatch_once_t = 0
        }

        dispatch_once(&Static.token){
            CSpec.setup()
        }
    }

    class func setup() {
        NSURLProtocol.registerClass(HTTPMocks)
    }
}

I'm using my CSpec class in the following test case

ProjectAPISpec.swift

import Foundation
import Quick
import Nimble

class ProjectAPISpec: CSpec {
    override func spec() {
        describe(".getOrders"){
            func subject() -> Void {
                waitUntil { done in
                    ProjectAPI.getOrders(1){ (orders) in
                        done()
                    }
                }
            }

            it("works"){
                subject()

                expect(true).to(beTruthy())
            }
        }
    }
}

to test the following code

ProjectAPI.swift

import Alamofire

let host: String = "<HOST>"
let token: String = "<TOKEN>"

class ProjectAPI {
    class func getOrders(page: Int, completionHandler: ([Product]) -> Void) {
        Alamofire.request(.GET, "http://\(host)/api/orders.json", parameters: ["page": page, "token": token])
            .response{ (request, response, data, error) in
                completionHandler([])
        }
    }
}

The implementation is not relevant and incomplete, but here's my question:

Why when I run the test, the callbacks of HTTPMock are not being triggered?