diff --git a/Makefile b/Makefile
index 86f99f83..7f3741d1 100644
--- a/Makefile
+++ b/Makefile
@@ -78,7 +78,7 @@ ENVTEST_ASSETS_DIR=$(shell pwd)/testbin
 test: manifests generate check ## Run tests.
 	mkdir -p ${ENVTEST_ASSETS_DIR}
 	test -f ${ENVTEST_ASSETS_DIR}/setup-envtest.sh || curl -sSLo ${ENVTEST_ASSETS_DIR}/setup-envtest.sh https://raw.githubusercontent.com/kubernetes-sigs/controller-runtime/v0.7.0/hack/setup-envtest.sh
-	source ${ENVTEST_ASSETS_DIR}/setup-envtest.sh; fetch_envtest_tools $(ENVTEST_ASSETS_DIR); setup_envtest_env $(ENVTEST_ASSETS_DIR); go test ./... -coverprofile cover.out
+	source ${ENVTEST_ASSETS_DIR}/setup-envtest.sh; fetch_envtest_tools $(ENVTEST_ASSETS_DIR); setup_envtest_env $(ENVTEST_ASSETS_DIR); go test ./pkg/... -coverprofile cover.out
 
 ##@ e2e
 e2e: $(GOBIN)/ginkgo $(GOBIN)/kind helm
diff --git a/tests/e2e/nebulacluster/nebulacluster.go b/tests/e2e/nebulacluster/nebulacluster.go
index 4b2508bf..11403706 100644
--- a/tests/e2e/nebulacluster/nebulacluster.go
+++ b/tests/e2e/nebulacluster/nebulacluster.go
@@ -35,7 +35,6 @@ import (
 	e2eframework "github.com/vesoft-inc/nebula-operator/tests/e2e/framework"
 )
 
-// nolint: dupl
 var _ = ginkgo.Describe("NebulaCluster", func() {
 	f := e2eframework.NewDefaultFramework("nebulacluster")
 
diff --git a/tests/e2e/nebulacluster/util.go b/tests/e2e/nebulacluster/util.go
index 3ef5751b..c6d53f76 100644
--- a/tests/e2e/nebulacluster/util.go
+++ b/tests/e2e/nebulacluster/util.go
@@ -31,7 +31,6 @@ import (
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/client-go/rest"
-	"k8s.io/client-go/util/retry"
 	"k8s.io/kubernetes/test/e2e/framework"
 	"k8s.io/utils/pointer"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -208,23 +207,6 @@ func waitForNebulaClusterDeleted(
 	})
 }
 
-func updateNebulaCluster(
-	nc *v1alpha1.NebulaCluster,
-	runtimeClient client.Client,
-	updateFunc func() error,
-) error {
-	key := client.ObjectKeyFromObject(nc)
-	return retry.RetryOnConflict(retry.DefaultRetry, func() error {
-		if err := runtimeClient.Get(context.TODO(), key, nc); err != nil {
-			return err
-		}
-		if err := updateFunc(); err != nil {
-			return err
-		}
-		return runtimeClient.Update(context.TODO(), nc)
-	})
-}
-
 type nebulaLog struct{}
 
 func (l nebulaLog) Info(msg string)  { framework.Logf(msg) }
@@ -232,7 +214,6 @@ func (l nebulaLog) Warn(msg string)  { framework.Logf(msg) }
 func (l nebulaLog) Error(msg string) { framework.Logf(msg) }
 func (l nebulaLog) Fatal(msg string) { framework.Logf(msg) }
 
-// nolint: unparam
 func waitForExecuteNebulaSchema(
 	timeout, pollInterval time.Duration,
 	address string,