diff --git a/test/e2e/daemon_restart.go b/test/e2e/daemon_restart.go
index 6bd4ebe685e..7ef21b5fd31 100644
--- a/test/e2e/daemon_restart.go
+++ b/test/e2e/daemon_restart.go
@@ -183,7 +183,8 @@ func getContainerRestarts(c *client.Client, ns string, labelSelector labels.Sele
 	return failedContainers, containerRestartNodes.List()
 }
 
-var _ = Describe("DaemonRestart [Disruptive]", func() {
+// Flaky issues #17829, #19023
+var _ = Describe("DaemonRestart [Disruptive] [Flaky]", func() {
 
 	framework := NewFramework("daemonrestart")
 	rcName := "daemonrestart" + strconv.Itoa(numPods) + "-" + string(util.NewUUID())
diff --git a/test/e2e/daemon_set.go b/test/e2e/daemon_set.go
index 8a12b44ba88..64fea07b2b6 100644
--- a/test/e2e/daemon_set.go
+++ b/test/e2e/daemon_set.go
@@ -126,7 +126,8 @@ var _ = Describe("Daemon set", func() {
 
 	})
 
-	It("should run and stop complex daemon", func() {
+	// Flaky issue #16623
+	It("should run and stop complex daemon [Flaky]", func() {
 		complexLabel := map[string]string{daemonsetNameLabel: dsName}
 		nodeSelector := map[string]string{daemonsetColorLabel: "blue"}
 		Logf("Creating daemon with a node selector %s", dsName)
diff --git a/test/e2e/es_cluster_logging.go b/test/e2e/es_cluster_logging.go
index b4c5d08eb1f..0e40bdf4f8b 100644
--- a/test/e2e/es_cluster_logging.go
+++ b/test/e2e/es_cluster_logging.go
@@ -30,7 +30,8 @@ import (
 	. "github.com/onsi/gomega"
 )
 
-var _ = Describe("Cluster level logging using Elasticsearch", func() {
+// Flaky issue #17873
+var _ = Describe("Cluster level logging using Elasticsearch [Flaky]", func() {
 	f := NewFramework("es-logging")
 
 	BeforeEach(func() {
diff --git a/test/e2e/ingress.go b/test/e2e/ingress.go
index 9f1e40d568c..2611786c0a3 100644
--- a/test/e2e/ingress.go
+++ b/test/e2e/ingress.go
@@ -377,7 +377,8 @@ func (cont *IngressController) Cleanup(del bool) error {
 }
 
 // Slow by design (10 min)
-var _ = Describe("GCE L7 LoadBalancer Controller [Serial] [Slow]", func() {
+// Flaky issue #17518
+var _ = Describe("GCE L7 LoadBalancer Controller [Serial] [Slow] [Flaky]", func() {
 	// These variables are initialized after framework's beforeEach.
 	var ns string
 	var addonDir string
diff --git a/test/e2e/monitor_resources.go b/test/e2e/monitor_resources.go
index 780c5e58217..a2f8ccce7da 100644
--- a/test/e2e/monitor_resources.go
+++ b/test/e2e/monitor_resources.go
@@ -72,7 +72,8 @@ func computeAverage(sliceOfUsages []resourceUsagePerContainer) (result resourceU
 
 // This tests does nothing except checking current resource usage of containers defined in kubelet_stats systemContainers variable.
 // Test fails if an average container resource consumption over datapointAmount tries exceeds amount defined in allowedUsage.
-var _ = Describe("Resource usage of system containers [Serial]", func() {
+// Flaky issue #13931
+var _ = Describe("Resource usage of system containers [Serial] [Flaky]", func() {
 	var c *client.Client
 	BeforeEach(func() {
 		var err error
diff --git a/test/e2e/namespace.go b/test/e2e/namespace.go
index 4861364a4ec..c3c63546a6f 100644
--- a/test/e2e/namespace.go
+++ b/test/e2e/namespace.go
@@ -91,7 +91,9 @@ var _ = Describe("Namespaces", func() {
 
 	//Confirms that namespace draining is functioning reasonably
 	//at minute intervals.
-	It("should delete fast enough (90 percent of 100 namespaces in 150 seconds)",
+	//
+	// Flaky issue #19026
+	It("should delete fast enough (90 percent of 100 namespaces in 150 seconds) [Flaky]",
 		func() { extinguish(c, 100, 10, 150) })
 
 	//comprehensive draining ; uncomment after #7372
diff --git a/test/e2e/nodeoutofdisk.go b/test/e2e/nodeoutofdisk.go
index 8e639729a5c..0fc97d83287 100644
--- a/test/e2e/nodeoutofdisk.go
+++ b/test/e2e/nodeoutofdisk.go
@@ -63,7 +63,8 @@ const (
 //    choose that node to be node with index 1.
 // 7. Observe that the pod in pending status schedules on that node.
 //
-var _ = Describe("NodeOutOfDisk [Serial]", func() {
+// Flaky issue #17687
+var _ = Describe("NodeOutOfDisk [Serial] [Flaky]", func() {
 	var c *client.Client
 	var unfilledNodeName, recoveredNodeName string
 	framework := Framework{BaseName: "node-outofdisk"}
diff --git a/test/e2e/pods.go b/test/e2e/pods.go
index cdaa4caadb4..f76aa8dfd31 100644
--- a/test/e2e/pods.go
+++ b/test/e2e/pods.go
@@ -897,7 +897,8 @@ var _ = Describe("Pods", func() {
 		}
 	})
 
-	It("should not back-off restarting a container on LivenessProbe failure", func() {
+	// Flaky issue #18293
+	It("should not back-off restarting a container on LivenessProbe failure [Flaky]", func() {
 		podClient := framework.Client.Pods(framework.Namespace.Name)
 		podName := "pod-back-off-liveness"
 		containerName := "back-off-liveness"
diff --git a/test/e2e/service.go b/test/e2e/service.go
index e83f63fe21c..30961950e8c 100644
--- a/test/e2e/service.go
+++ b/test/e2e/service.go
@@ -778,7 +778,8 @@ var _ = Describe("Services", func() {
 	})
 
 	// This test hits several load-balancer cases because LB turnup is slow.
-	It("should serve identically named services in different namespaces on different load-balancers", func() {
+	// Flaky issue #18952
+	It("should serve identically named services in different namespaces on different load-balancers [Flaky]", func() {
 		// requires ExternalLoadBalancer
 		SkipUnlessProviderIs("gce", "gke", "aws")
 
diff --git a/test/e2e/service_accounts.go b/test/e2e/service_accounts.go
index 0169e546440..bc958345a89 100644
--- a/test/e2e/service_accounts.go
+++ b/test/e2e/service_accounts.go
@@ -30,7 +30,8 @@ import (
 	. "github.com/onsi/ginkgo"
 )
 
-var _ = Describe("ServiceAccounts", func() {
+// Flaky issue #19024
+var _ = Describe("ServiceAccounts [Flaky]", func() {
 	f := NewFramework("svcaccounts")
 
 	It("should mount an API token into pods [Conformance]", func() {