                     provider = RxMoyaProvider<GitHub>(queue: queue)
                 }
                 
-                context("queue is provided with request", {
-                    it("invoke callback on request queue", closure: {
+                context("the queue is provided with the request") {
+                    it("invokes the callback on request queue") {
                         let requestQueue = DispatchQueue(label: UUID().uuidString)
                         var callbackQueueLabel: String?
                         

                        })
                        
                        expect(callbackQueueLabel) == queue.label
                    })
                })
            })
            
            describe("a provider without predefined queue", {
                var provider: RxMoyaProvider<GitHub>!
                var disposeBag: DisposeBag!
                

                    provider = RxMoyaProvider<GitHub>()
                }
                
                context("the queue is provided with request") {
                    it("invokes the callback on the specified queue") {
                        let requestQueue = DispatchQueue(label: UUID().uuidString)
                        var callbackQueueLabel: String?
                        
