diff --git a/artifacts/deploy/karmada-scheduler.yaml b/artifacts/deploy/karmada-scheduler.yaml
index 23284c889..c0f003ca4 100644
--- a/artifacts/deploy/karmada-scheduler.yaml
+++ b/artifacts/deploy/karmada-scheduler.yaml
@@ -29,6 +29,7 @@ spec:
             - --bind-address=0.0.0.0
             - --secure-port=10351
             - --failover=true
+            - --v=4
           volumeMounts:
             - name: kubeconfig
               subPath: kubeconfig
diff --git a/artifacts/deploy/karmada-webhook.yaml b/artifacts/deploy/karmada-webhook.yaml
index 55b192174..d615f16a9 100644
--- a/artifacts/deploy/karmada-webhook.yaml
+++ b/artifacts/deploy/karmada-webhook.yaml
@@ -29,6 +29,7 @@ spec:
             - --bind-address=0.0.0.0
             - --secure-port=8443
             - --cert-dir=/var/serving-cert
+            - --v=4
           ports:
             - containerPort: 8443
           volumeMounts:
diff --git a/artifacts/deploy/kube-controller-manager.yaml b/artifacts/deploy/kube-controller-manager.yaml
index 6aca18a6d..36527330f 100644
--- a/artifacts/deploy/kube-controller-manager.yaml
+++ b/artifacts/deploy/kube-controller-manager.yaml
@@ -51,7 +51,7 @@ spec:
             - --service-account-private-key-file=/etc/karmada/pki/karmada.key
             - --service-cluster-ip-range=10.96.0.0/12
             - --use-service-account-credentials=true
-            - --v=5
+            - --v=4
           image: k8s.gcr.io/kube-controller-manager:v1.19.1
           imagePullPolicy: IfNotPresent
           name: kube-controller-manager
diff --git a/test/e2e/failover_test.go b/test/e2e/failover_test.go
index cf935ce85..3be7f4a22 100644
--- a/test/e2e/failover_test.go
+++ b/test/e2e/failover_test.go
@@ -3,6 +3,7 @@ package e2e
 import (
 	"context"
 	"fmt"
+	"strings"
 
 	"github.com/onsi/ginkgo"
 	"github.com/onsi/gomega"
@@ -208,10 +209,8 @@ func recoverCluster(c client.Client, clusterName string, originalAPIEndpoint str
 // get the target cluster names from binding information
 func getTargetClusterNames(deployment *appsv1.Deployment) (targetClusterNames []string, err error) {
 	bindingName := names.GenerateBindingName(deployment.Kind, deployment.Name)
-	fmt.Printf("deploy kind is %s, name is %s\n", deployment.Kind, deployment.Name)
 	binding := &workv1alpha1.ResourceBinding{}
 
-	fmt.Printf("collect the target clusters in resource binding\n")
 	err = wait.PollImmediate(pollInterval, pollTimeout, func() (done bool, err error) {
 		err = controlPlaneClient.Get(context.TODO(), client.ObjectKey{Namespace: deployment.Namespace, Name: bindingName}, binding)
 		if err != nil {
@@ -220,6 +219,12 @@ func getTargetClusterNames(deployment *appsv1.Deployment) (targetClusterNames []
 			}
 			return false, err
 		}
+
+		if len(binding.Spec.Clusters) == 0 {
+			klog.Infof("The ResourceBinding(%s/%s) hasn't been scheduled.", binding.Namespace, binding.Name)
+			return false, nil
+		}
+
 		return true, nil
 	})
 	if err != nil {
@@ -228,7 +233,7 @@ func getTargetClusterNames(deployment *appsv1.Deployment) (targetClusterNames []
 	for _, cluster := range binding.Spec.Clusters {
 		targetClusterNames = append(targetClusterNames, cluster.Name)
 	}
-	fmt.Printf("target clusters in resource binding are %s\n", targetClusterNames)
+	klog.Infof("The ResourceBinding(%s/%s) schedule result is: %s", binding.Namespace, binding.Name, strings.Join(targetClusterNames, ","))
 	return targetClusterNames, nil
 }
 
diff --git a/test/e2e/tainttoleration_test.go b/test/e2e/tainttoleration_test.go
index 30cd140f7..740b35367 100644
--- a/test/e2e/tainttoleration_test.go
+++ b/test/e2e/tainttoleration_test.go
@@ -9,6 +9,7 @@ import (
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/rand"
+	"k8s.io/klog/v2"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
@@ -59,11 +60,12 @@ var _ = ginkgo.Describe("propagation with taint and toleration testing", func()
 		ginkgo.BeforeEach(func() {
 			ginkgo.By("adding taints to clusters", func() {
 				for _, cluster := range clusterNames {
-					fmt.Printf("add taints to cluster %v", cluster)
 					clusterObj := &clusterv1alpha1.Cluster{}
 					err := controlPlaneClient.Get(context.TODO(), client.ObjectKey{Name: cluster}, clusterObj)
 					gomega.Expect(err).ShouldNot(gomega.HaveOccurred())
 
+					// TODO(RainbowMango): This will overrides the taints already exist in the cluster.
+					// Should merge new taint to it and cleanup after testing.
 					clusterObj.Spec.Taints = []corev1.Taint{
 						{
 							Key:    tolerationKey,
@@ -72,6 +74,9 @@ var _ = ginkgo.Describe("propagation with taint and toleration testing", func()
 						},
 					}
 
+					for _, taint := range clusterObj.Spec.Taints {
+						klog.Infof("Adding taints(%s) to cluster(%s)", taint.ToString(), clusterObj.Name)
+					}
 					err = controlPlaneClient.Update(context.TODO(), clusterObj)
 					gomega.Expect(err).ShouldNot(gomega.HaveOccurred())
 				}
@@ -100,7 +105,7 @@ var _ = ginkgo.Describe("propagation with taint and toleration testing", func()
 		})
 
 		ginkgo.It("deployment with cluster tolerations testing", func() {
-			ginkgo.By(fmt.Sprintf("creating deployment(%s/%s)", deploymentNamespace, deploymentName), func() {
+			ginkgo.By(fmt.Sprintf("creating deployment(%s/%s)", deployment.Namespace, deployment.Name), func() {
 				_, err := kubeClient.AppsV1().Deployments(testNamespace).Create(context.TODO(), deployment, metav1.CreateOptions{})
 				gomega.Expect(err).ShouldNot(gomega.HaveOccurred())
 			})