diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ae3ec73..c65aeff 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -15,8 +15,8 @@ jobs:
         with:
           go-version: ${{ matrix.go-version }}
       - name: Install dependencies
-        run: go install .
-      - name: Unit test
-        run: go test ./...
-      - name: Build test
-        run: go build .
+        run: |-
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.59.1
+          curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+      - name: CI
+        run: ./scripts/ci.sh
diff --git a/pkg/apis/flatnetwork.pandaria.io/v1/types_test.go b/pkg/apis/flatnetwork.pandaria.io/v1/types_test.go
deleted file mode 100644
index 84f1414..0000000
--- a/pkg/apis/flatnetwork.pandaria.io/v1/types_test.go
+++ /dev/null
@@ -1,113 +0,0 @@
-package v1_test
-
-import (
-	"encoding/json"
-	"net"
-	"os"
-	"testing"
-
-	flv1 "github.com/cnrancher/rancher-flat-network-operator/pkg/apis/flatnetwork.pandaria.io/v1"
-	"gopkg.in/yaml.v3"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-)
-
-var subnet = flv1.FlatNetworkSubnet{
-	TypeMeta: metav1.TypeMeta{
-		APIVersion: "flatnetwork.pandaria.io/v1",
-		Kind:       "FlatNetworkSubnet",
-	},
-	ObjectMeta: metav1.ObjectMeta{
-		Name:      "example-macvlan-subnet",
-		Namespace: flv1.SubnetNamespace,
-		Labels: map[string]string{
-			"project": "",
-		},
-	},
-	Spec: flv1.SubnetSpec{
-		FlatMode: "macvlan",
-		Master:   "eth0",
-		VLAN:     0,
-		CIDR:     "192.168.1.0/24",
-		Mode:     "",
-		Gateway:  nil,
-		Ranges: []flv1.IPRange{
-			{
-				From: net.ParseIP("192.168.1.100"),
-				End:  net.ParseIP("192.168.1.200"),
-			},
-		},
-		Routes: []flv1.Route{},
-		PodDefaultGateway: flv1.PodDefaultGateway{
-			Enable:      false,
-			ServiceCIDR: "",
-		},
-	},
-}
-
-func saveYaml(obj any, path string) error {
-	b, _ := json.MarshalIndent(obj, "", "  ")
-	m := map[string]any{}
-	err := json.Unmarshal(b, &m)
-	if err != nil {
-		return err
-	}
-	b, _ = yaml.Marshal(m)
-	return os.WriteFile(path, b, 0644)
-}
-
-func Test_FlatNetworkSubnet_Macvlan(t *testing.T) {
-	subnet.Name = "example-macvlan-subnet"
-	subnet.Spec.FlatMode = "macvlan"
-	err := saveYaml(subnet, "../../../../docs/macvlan/subnet-example.yaml")
-	if err != nil {
-		t.Error(err)
-	}
-}
-
-func Test_FlatNetworkSubnet_Macvlan_IPv6(t *testing.T) {
-	subnet.Name = "example-macvlan-subnet-ipv6"
-	subnet.Spec.FlatMode = "macvlan"
-	subnet.Spec.CIDR = "fd00:aaaa::/64"
-	subnet.Spec.Ranges = []flv1.IPRange{
-		{
-			From: net.ParseIP("fd00:aaaa::1000"),
-			End:  net.ParseIP("fd00:aaaa::ffff"),
-		},
-	}
-	err := saveYaml(subnet, "../../../../docs/macvlan/subnet-example-ipv6.yaml")
-	if err != nil {
-		t.Error(err)
-	}
-}
-
-func Test_FlatNetworkSubnet_IPvlan(t *testing.T) {
-	subnet.Name = "example-ipvlan-subnet"
-	subnet.Spec.FlatMode = "ipvlan"
-	subnet.Spec.CIDR = "192.168.2.0/24"
-	subnet.Spec.Ranges = []flv1.IPRange{
-		{
-			From: net.ParseIP("192.168.2.100"),
-			End:  net.ParseIP("192.168.2.150"),
-		},
-	}
-	err := saveYaml(subnet, "../../../../docs/ipvlan/subnet-example.yaml")
-	if err != nil {
-		t.Error(err)
-	}
-}
-
-func Test_FlatNetworkSubnet_IPvlan_IPv6(t *testing.T) {
-	subnet.Name = "example-ipvlan-subnet-ipv6"
-	subnet.Spec.FlatMode = "ipvlan"
-	subnet.Spec.CIDR = "fd00:eeee::/64"
-	subnet.Spec.Ranges = []flv1.IPRange{
-		{
-			From: net.ParseIP("fd00:eeee::1000"),
-			End:  net.ParseIP("fd00:eeee::ffff"),
-		},
-	}
-	err := saveYaml(subnet, "../../../../docs/ipvlan/subnet-example-ipv6.yaml")
-	if err != nil {
-		t.Error(err)
-	}
-}
diff --git a/scripts/validate.sh b/scripts/validate.sh
index 1df5276..dc841a9 100755
--- a/scripts/validate.sh
+++ b/scripts/validate.sh
@@ -4,6 +4,12 @@ set -euo pipefail
 cd $(dirname $0)/..
 WORKINGDIR=$(pwd)
 
+if [ -n "$(git status --porcelain --untracked-files=no)" ]; then
+  echo 'Ensure git directory is clean before run this script:'
+  git status --short
+  exit 1
+fi
+
 echo 'Running: go mod verify'
 go mod verify