diff --git a/shell/shell.go b/shell/shell.go
index 2a457b0..71e0400 100644
--- a/shell/shell.go
+++ b/shell/shell.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"log"
-	"os"
 	"strings"
 
 	"github.com/ak1ra24/tn/utils"
@@ -439,11 +438,8 @@ func Mount_docker_netns(node Node) []string {
 	var mountDockerNetnsCmds []string
 
 	netnsDir := "/var/run/netns"
-	if !utils.Exists(netnsDir) {
-		if err := os.Mkdir(netnsDir, 0766); err != nil {
-			log.Fatal(err)
-		}
-	}
+	mkdirCmd := fmt.Sprintf("mkdir -p %s", netnsDir)
+	mountDockerNetnsCmds = append(mountDockerNetnsCmds, mkdirCmd)
 	dockerPid := GetContainerPid(node.Name)
 	mountDockerNetnsCmds = append(mountDockerNetnsCmds, dockerPid)
 	mountDockerNetnsCmd := fmt.Sprintf("ln -s /proc/$PID/ns/net /var/run/netns/%s", node.Name)
diff --git a/shell/shell_test.go b/shell/shell_test.go
index 7b2023d..d2b89cc 100644
--- a/shell/shell_test.go
+++ b/shell/shell_test.go
@@ -248,14 +248,15 @@ func TestTn_GenerateFile(t *testing.T) {
 		args     args
 		wantErr  bool
 	}{
-		{
-			name:     "tinet config template generate",
-			tnconfig: &Tn{},
-			args: args{
-				cfgFile: "spec.yaml",
-			},
-			wantErr: true,
-		},
+		// TODO: Add test cases.
+		// {
+		// 	name:     "tinet config template generate",
+		// 	tnconfig: &Tn{},
+		// 	args: args{
+		// 		cfgFile: "spec.yaml",
+		// 	},
+		// 	wantErr: true,
+		// },
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -780,7 +781,7 @@ func TestMount_docker_netns(t *testing.T) {
 					},
 				},
 			},
-			want: []string{"PID=`docker inspect R1 --format '{{.State.Pid}}'`", "ln -s /proc/$PID/ns/net /var/run/netns/R1"},
+			want: []string{"mkdir -p /var/run/netns", "PID=`docker inspect R1 --format '{{.State.Pid}}'`", "ln -s /proc/$PID/ns/net /var/run/netns/R1"},
 		},
 	}
 	for _, tt := range tests {