 }
 
 WeakReferenceRaceTests.test("direct capture (load)") {
-  let q = dispatch_queue_create("", DISPATCH_QUEUE_CONCURRENT)!
+  let q = forwardOptional(dispatch_queue_create("", DISPATCH_QUEUE_CONCURRENT))
 
   // Capture a weak reference directly in multiple closures
   for i in 1...iterations {

}

WeakReferenceRaceTests.test("direct capture (copy)") {
  let q = dispatch_queue_create("", DISPATCH_QUEUE_CONCURRENT)!

  // Capture a weak reference directly in multiple closures
  for i in 1...iterations {

}

WeakReferenceRaceTests.test("class instance property [SR-192] (load)") {
  let q = forwardOptional(dispatch_queue_create("", DISPATCH_QUEUE_CONCURRENT))

  // Capture a weak reference via its container object
  // "https://bugs.swift.org/browse/SR-192"
