diff --git a/internal/cluster/clutser_test.go b/internal/cluster/clutser_test.go
index e4fc808..2e378df 100644
--- a/internal/cluster/clutser_test.go
+++ b/internal/cluster/clutser_test.go
@@ -35,24 +35,34 @@ func createSimulationCluster(nums int) ([]*Cluster, error) {
 	return result, nil
 }
 
-func TestSingleClusterLifetime(t *testing.T) {
-	clusters, err := createSimulationCluster(1)
-	if err != nil {
-		t.Errorf("create simulation cluster failed: %v", err)
-		return
+func launchSimulationCluster(clusters []*Cluster, t *testing.T) {
+	for _, cluster := range clusters {
+		cluster.Launch()
 	}
-	clusters[0].Launch()
-	defer func() {
-		clusters[0].Close()
+}
+
+func closeSimulationCluster(clusters []*Cluster, t *testing.T) {
+	for _, cluster := range clusters {
+		cluster.Close()
 		// wait for the cluster to close
 		time.Sleep(time.Second * 1)
 		// check if the cluster is closed
-		_, err := cache.GetMapField[node](CLUSTER_STATUS_HASH_MAP_KEY, clusters[0].id)
+		_, err := cache.GetMapField[node](CLUSTER_STATUS_HASH_MAP_KEY, cluster.id)
 		if err == nil {
 			t.Errorf("cluster is not closed")
 			return
 		}
-	}()
+	}
+}
+
+func TestSingleClusterLifetime(t *testing.T) {
+	clusters, err := createSimulationCluster(1)
+	if err != nil {
+		t.Errorf("create simulation cluster failed: %v", err)
+		return
+	}
+	launchSimulationCluster(clusters, t)
+	defer closeSimulationCluster(clusters, t)
 
 	time.Sleep(time.Second * 1)
 
@@ -69,24 +79,10 @@ func TestMultipleClusterLifetime(t *testing.T) {
 		t.Errorf("create simulation cluster failed: %v", err)
 		return
 	}
-
-	for _, cluster := range clusters {
-		cluster.Launch()
-		defer func(cluster *Cluster) {
-			cluster.Close()
-			// wait for the cluster to close
-			time.Sleep(time.Second * 1)
-			// check if the cluster is closed
-			_, err := cache.GetMapField[node](CLUSTER_STATUS_HASH_MAP_KEY, cluster.id)
-			if err == nil {
-				t.Errorf("cluster is not closed")
-				return
-			}
-		}(cluster)
-	}
+	launchSimulationCluster(clusters, t)
+	defer closeSimulationCluster(clusters, t)
 
 	time.Sleep(time.Second * 1)
-
 	has_master := false
 
 	for _, cluster := range clusters {
@@ -117,21 +113,8 @@ func TestClusterSubstituteMaster(t *testing.T) {
 		t.Errorf("create simulation cluster failed: %v", err)
 		return
 	}
-
-	for _, cluster := range clusters {
-		cluster.Launch()
-		defer func(cluster *Cluster) {
-			cluster.Close()
-			// wait for the cluster to close
-			time.Sleep(time.Second * 1)
-			// check if the cluster is closed
-			_, err := cache.GetMapField[node](CLUSTER_STATUS_HASH_MAP_KEY, cluster.id)
-			if err == nil {
-				t.Errorf("cluster is not closed")
-				return
-			}
-		}(cluster)
-	}
+	launchSimulationCluster(clusters, t)
+	defer closeSimulationCluster(clusters, t)
 
 	time.Sleep(time.Second * 1)
 
@@ -184,21 +167,8 @@ func TestClusterAutoGCNoLongerActiveNode(t *testing.T) {
 		t.Errorf("create simulation cluster failed: %v", err)
 		return
 	}
-
-	for _, cluster := range clusters {
-		cluster.Launch()
-		defer func(cluster *Cluster) {
-			cluster.Close()
-			// wait for the cluster to close
-			time.Sleep(time.Second * 1)
-			// check if the cluster is closed
-			_, err := cache.GetMapField[node](CLUSTER_STATUS_HASH_MAP_KEY, cluster.id)
-			if err == nil {
-				t.Errorf("cluster is not closed")
-				return
-			}
-		}(cluster)
-	}
+	launchSimulationCluster(clusters, t)
+	defer closeSimulationCluster(clusters, t)
 
 	time.Sleep(time.Second * 1)
 
diff --git a/internal/cluster/plugin_test.go b/internal/cluster/plugin_test.go
index d8d322c..1ec78e7 100644
--- a/internal/cluster/plugin_test.go
+++ b/internal/cluster/plugin_test.go
@@ -20,12 +20,3 @@ func getRandomPluginRuntime() entities.PluginRuntime {
 		},
 	}
 }
-
-// func TestPluginScheduleLifetime(t *testing.T) {
-// 	plugin := getRandomPluginRuntime()
-// 	cluster, err := createSimulationCluster(1)
-// 	if err != nil {
-// 		t.Errorf("create simulation cluster failed: %v", err)
-// 		return
-// 	}
-// }