 
             let observer = self.expect(queue).toEnqueueOperationsWithCount(1)
 
-            let task = pipeline.loadImage(with: request)
+            let task = pipeline.loadImage(with: request) { _ in }
             wait() // Wait till the operation is created.
 
             // When/Then


            let observer = self.expect(queue).toEnqueueOperationsWithCount(1)

            let task = pipeline.loadImage(with: request)
            wait() // Wait till the operation is created.

            // When/Then


            let observer = self.expect(queue).toEnqueueOperationsWithCount(1)

            let task = pipeline.loadImage(with: request) { _ in }
            wait() // Wait till the operation is created.

            // When/Then
