framework.ExpectNoError(checkMasterVersion(f.ClientSet, v))
			})
			cm.Register(func(sem *chaosmonkey.Semaphore) {
				// Close over f.
				testServiceRemainsUp(f, sem)
			})
			cm.Do()
		})
	})

	framework.KubeDescribe("node upgrade", func() {
		It("should maintain a functioning cluster [Feature:NodeUpgrade]", func() {
			cm := chaosmonkey.New(func() {
				v, err := realVersion(framework.TestContext.UpgradeTarget)
				framework.ExpectNoError(err)
				framework.ExpectNoError(framework.NodeUpgrade(f, v, framework.TestContext.UpgradeImage))
				framework.ExpectNoError(checkNodesVersions(f.ClientSet, v))
			})
			cm.Register(func(sem *chaosmonkey.Semaphore) {
				// Close over f.
				testServiceUpBeforeAndAfter(f, sem)
			})
			cm.Do()
		})

		It("should maintain responsive services [Feature:ExperimentalNodeUpgrade]", func() {
			cm := chaosmonkey.New(func() {
				v, err := realVersion(framework.TestContext.UpgradeTarget)
				framework.ExpectNoError(err)
				framework.ExpectNoError(framework.NodeUpgrade(f, v, framework.TestContext.UpgradeImage))
				framework.ExpectNoError(checkNodesVersions(f.ClientSet, v))
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				framework.ExpectNoError(checkMasterVersion(f.Client, v))
			})
			cm.Register(func(sem *chaosmonkey.Semaphore) {
				// Close over f.
				testServiceRemainsUp(f, sem)
			})
			cm.Do()
		})
	})

	framework.KubeDescribe("node upgrade", func() {
		It("should maintain a functioning cluster [Feature:NodeUpgrade]", func() {
			cm := chaosmonkey.New(func() {
				v, err := realVersion(framework.TestContext.UpgradeTarget)
				framework.ExpectNoError(err)
				framework.ExpectNoError(framework.NodeUpgrade(f, v))
				framework.ExpectNoError(checkNodesVersions(f.Client, v))
			})
			cm.Register(func(sem *chaosmonkey.Semaphore) {
				// Close over f.
				testServiceUpBeforeAndAfter(f, sem)
			})
			cm.Do()
		})

		It("should maintain responsive services [Feature:ExperimentalNodeUpgrade]", func() {
			cm := chaosmonkey.New(func() {
				v, err := realVersion(framework.TestContext.UpgradeTarget)
				framework.ExpectNoError(err)
				framework.ExpectNoError(framework.NodeUpgrade(f, v))
				framework.ExpectNoError(checkNodesVersions(f.Client, v))