                 OHHTTPStubs.removeStub(stubDescriptor)
             }
             
-            describe("a provider with predefined queue", {
+            describe("a provider with predefined queue") {
                 var provider: RxMoyaProvider<GitHub>!
                 var queue: DispatchQueue!
                 var disposeBag: DisposeBag!

                        })
                        
                        expect(callbackQueueLabel) == requestQueue.label
                    })
                })
                
                context("queue is not provided with request", {
                    it("invoke callback on main queue", closure: {
                        var callbackQueueLabel: String?
                        
                        waitUntil(action: { completion in

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