diff --git a/RxSwift/Subjects/Variable.swift b/RxSwift/Subjects/Variable.swift
index e9c04472..b80676d8 100644
--- a/RxSwift/Subjects/Variable.swift
+++ b/RxSwift/Subjects/Variable.swift
@@ -62,6 +62,7 @@ public class Variable<Element> : ObservableType {
     - parameter observer: Observer to subscribe to variable values.
     - returns: Disposable object that can be used to unsubscribe the observer from the variable.
     */
+    @warn_unused_result(message="http://git.io/rxs.ud")
     public func subscribe<O: ObserverType where O.E == E>(observer: O) -> Disposable {
         return _subject.subscribe(observer)
     }
diff --git a/RxTests/RxCocoaTests/Control+RxTests+UIKit.swift b/RxTests/RxCocoaTests/Control+RxTests+UIKit.swift
index b502e7e9..e8c45f29 100644
--- a/RxTests/RxCocoaTests/Control+RxTests+UIKit.swift
+++ b/RxTests/RxCocoaTests/Control+RxTests+UIKit.swift
@@ -15,7 +15,8 @@ extension ControlTests {
     func testSubscribeEnabledToTrue() {
         let subject = UIControl()
         let enabledSequence = Variable<Bool>(false)
-        enabledSequence.subscribe(subject.rx_enabled)
+        let disposable = enabledSequence.subscribe(subject.rx_enabled)
+        defer { disposable.dispose() }
 
         enabledSequence.value = true
         XCTAssert(subject.enabled == true, "Expected enabled set to true")
@@ -24,7 +25,8 @@ extension ControlTests {
     func testSubscribeEnabledToFalse() {
         let subject = UIControl()
         let enabledSequence = Variable<Bool>(true)
-        enabledSequence.subscribe(subject.rx_enabled)
+        let disposable = enabledSequence.subscribe(subject.rx_enabled)
+        defer { disposable.dispose() }
 
         enabledSequence.value = false
         XCTAssert(subject.enabled == false, "Expected enabled set to false")
@@ -163,8 +165,8 @@ extension ControlTests {
     func testLabel_NextElementsSetsValue() {
         let subject = UILabel()
         let attributedTextSequence = Variable<NSAttributedString?>(nil)
-
-        attributedTextSequence.subscribe(subject.rx_attributedText)
+        let disposable = attributedTextSequence.subscribe(subject.rx_attributedText)
+        defer { disposable.dispose() }
 
         attributedTextSequence.value = NSAttributedString(string: "Hello!")
         XCTAssert(subject.attributedText == attributedTextSequence.value, "Expected attributedText to have been set")
@@ -323,7 +325,8 @@ extension ControlTests {
         let subject = UIActivityIndicatorView()
         let boolSequence = Variable<Bool>(false)
 
-        boolSequence.subscribe(subject.rx_animating)
+        let disposable = boolSequence.subscribe(subject.rx_animating)
+        defer { disposable.dispose() }
 
         boolSequence.value = true
         XCTAssertTrue(subject.isAnimating(), "Expected animation to be started")