     }
     
     func testUtilsTraverseMultipleErrors() {
-        let e = self.expectationWithDescription("")
+        let e = self.expectation()
         
         let evenFuture: Int -> Future<Bool> = { i in
             return future { err in

    }
    
    func testFilterNoSuchElement() {
        let e = self.expectationWithDescription("")
        future(3).filter { $0 > 5}.onComplete { result in
            if let err = result.error {
                XCTAssert(err.domain == NoSuchElementError, "filter should yield no result")

        
        var answer = 10
        
        let e = self.expectation()
        
        let f = future(4)
        let f1 = f.andThen { result in
