 			var subject = UIBarButtonItem(barButtonSystemItem: .save, target: nil, action: nil)
 
 			subject.rx.action = emptyAction(.just(false))
-            expect(subject.target).toEventuallyNot( beNil() )
-
-			expect(subject.isEnabled) == false
+            expect(subject.target).toEventuallyNot(beNil())
+			expect(subject.isEnabled).to(beFalse())
 		}
 
 		it("doesn't execute a disabled action when tapped") {

			})
			subject.rx.action = action
            // Setting the action has the asynchronous effect of adding a target.
            expect(subject.target).toEventuallyNot( beNil() )

			_ = subject.target?.perform(subject.action, with: subject)

			expect(executed) == true
		}

		it("disposes of old action subscriptions when re-set") {

			})

			_ = subject.target?.perform(subject.action, with: subject)
			expect(executed) == false
		}

