diff --git a/e2e/addon/addon_test.go b/e2e/addon/addon_test.go
index 9042c2d38..cd91d3996 100644
--- a/e2e/addon/addon_test.go
+++ b/e2e/addon/addon_test.go
@@ -196,13 +196,6 @@ var _ = Describe("Addon Test", func() {
 				}
 				Expect(topologyPolicyValue["clusterLabelSelector"]).Should(Equal(map[string]interface{}{}))
 			}, 30*time.Second).Should(Succeed())
-			// disable mock-dependence-rely and mock-dependence addon
-			/*output1, err := e2e.LongTimeExec("vela addon disable mock-dependence-rely", 600*time.Second)
-			Expect(err).NotTo(HaveOccurred())
-			Expect(output1).To(ContainSubstring("Successfully disable addon"))
-			output2, err := e2e.LongTimeExec("vela addon disable mock-dependence", 600*time.Second)
-			Expect(err).NotTo(HaveOccurred())
-			Expect(output2).To(ContainSubstring("Successfully disable addon"))*/
 		})
 
 		It("enable mock-dependence-rely without specified clusters when mock-dependence addon was enabled with specified clusters", func() {
@@ -248,13 +241,6 @@ var _ = Describe("Addon Test", func() {
 				Expect(topologyPolicyValue["clusterLabelSelector"]).Should(Equal(map[string]interface{}{}))
 				Expect(topologyPolicyValue["clusters"]).Should(BeNil())
 			}, 30*time.Second).Should(Succeed())
-			// 4. disable mock-dependence-rely and mock-dependence addon
-			/*output2, err := e2e.LongTimeExec("vela addon disable mock-dependence-rely", 600*time.Second)
-			Expect(err).NotTo(HaveOccurred())
-			Expect(output2).To(ContainSubstring("Successfully disable addon"))
-			output3, err := e2e.LongTimeExec("vela addon disable mock-dependence", 600*time.Second)
-			Expect(err).NotTo(HaveOccurred())
-			Expect(output3).To(ContainSubstring("Successfully disable addon"))*/
 		})
 
 		It("Test addon dependency with specified clusters", func() {
diff --git a/pkg/addon/addon_suite_test.go b/pkg/addon/addon_suite_test.go
index 6104199e5..18bf40000 100644
--- a/pkg/addon/addon_suite_test.go
+++ b/pkg/addon/addon_suite_test.go
@@ -200,6 +200,30 @@ var _ = Describe("Addon test", func() {
 		Expect(needInstallAddonDep2).Should(BeFalse())
 		Expect(depClusters2).Should(BeNil())
 		Expect(err).Should(BeNil())
+
+		// case4: addonClusters is nil, and app has topology policy
+		app = v1beta1.Application{}
+		Expect(yaml.Unmarshal([]byte(legacy2AppYaml), &app)).Should(BeNil())
+		app.SetNamespace(testns)
+		Expect(k8sClient.Create(ctx, &app)).Should(BeNil())
+		Eventually(func(g Gomega) {
+			needInstallAddonDep, depClusters, err := checkDependencyNeedInstall(ctx, k8sClient, "legacy-addon2", nil)
+			Expect(err).Should(BeNil())
+			Expect(needInstallAddonDep).Should(BeTrue())
+			Expect(depClusters).Should(BeNil())
+		}, 60*time.Second).Should(Succeed())
+
+		// case5: addonClusters is nil, and app has topology policy, and clusterLabelSelector is not nil
+		app = v1beta1.Application{}
+		Expect(yaml.Unmarshal([]byte(legacy3AppYaml), &app)).Should(BeNil())
+		app.SetNamespace(testns)
+		Expect(k8sClient.Create(ctx, &app)).Should(BeNil())
+		Eventually(func(g Gomega) {
+			needInstallAddonDep, depClusters, err := checkDependencyNeedInstall(ctx, k8sClient, "legacy-addon3", nil)
+			Expect(err).Should(BeNil())
+			Expect(needInstallAddonDep).Should(BeFalse())
+			Expect(depClusters).Should(BeNil())
+		}, 60*time.Second).Should(Succeed())
 	})
 
 	It("getDependencyArgs func test", func() {
@@ -213,11 +237,28 @@ var _ = Describe("Addon test", func() {
 		app = v1beta1.Application{}
 		Expect(yaml.Unmarshal([]byte(legacyAppYaml), &app)).Should(BeNil())
 		app.SetNamespace(testns)
-		Expect(k8sClient.Create(ctx, &app)).Should(BeNil())
+		//Expect(k8sClient.Create(ctx, &app)).Should(BeNil())
 		depClusters := []string{"cluster1", "cluster2"}
 		depArgs2, err := getDependencyArgs(ctx, k8sClient, depAddonName, depClusters)
 		Expect(depArgs2["clusters"]).Should(Equal(depClusters))
 		Expect(err).Should(BeNil())
+
+		// clusters exist, depClusters is nil
+		sec := v1.Secret{}
+		Expect(yaml.Unmarshal([]byte(secretYaml), &sec)).Should(BeNil())
+		Expect(k8sClient.Create(ctx, &sec)).Should(BeNil())
+		depArgs3, err := getDependencyArgs(ctx, k8sClient, "fluxcd", nil)
+		Expect(depArgs3).ToNot(BeNil())
+		Expect(depArgs3["clusters"]).Should(BeNil())
+		Expect(err).Should(BeNil())
+
+		// getArgs throw exception
+		sec1 := v1.Secret{}
+		Expect(yaml.Unmarshal([]byte(secretErrorYaml), &sec1)).Should(BeNil())
+		Expect(k8sClient.Create(ctx, &sec1)).Should(BeNil())
+		depArgs4, err := getDependencyArgs(ctx, k8sClient, "fluxcd1", nil)
+		Expect(depArgs4).Should(BeNil())
+		Expect(err).ToNot(BeNil())
 	})
 
 	It(" determineAddonAppName func test", func() {
@@ -623,6 +664,60 @@ spec:
       properties:
         image: crccheck/hello-world
         port: 8000
+`
+	legacy2AppYaml = `apiVersion: core.oam.dev/v1beta1
+kind: Application
+metadata:
+  name: legacy-addon2
+spec:
+  components:
+    - name: express-server
+      type: webservice
+      properties:
+        image: crccheck/hello-world
+        port: 8000
+  policies:
+    - name: target-default
+      type: topology
+      properties:
+        clusters: ["local"]
+        namespace: "default"
+`
+	legacy3AppYaml = `apiVersion: core.oam.dev/v1beta1
+kind: Application
+metadata:
+  name: legacy-addon3
+spec:
+  components:
+    - name: express-server
+      type: webservice
+      properties:
+        image: crccheck/hello-world
+        port: 8000
+  policies:
+    - name: target-default
+      type: topology
+      properties:
+        clusterLabelSelector: {}
+        namespace: "default"
+`
+	secretYaml = `apiVersion: v1
+data:
+  addonParameterDataKey: eyJjbHVzdGVycyI6WyJsb2NhbCIsInZlbGEtbTEiXX0K
+kind: Secret
+metadata:
+  name: addon-secret-fluxcd
+  namespace: vela-system
+type: Opaque
+`
+	secretErrorYaml = `apiVersion: v1
+data:
+  addonParameterDataKey: eyJjbHVzdGVycyI6WyJsb2NhbCIsInZlbGEtbTEiXQo=
+kind: Secret
+metadata:
+  name: addon-secret-fluxcd1
+  namespace: vela-system
+type: Opaque
 `
 	deployYaml = `apiVersion: apps/v1
 kind: Deployment