diff --git a/cmd/kubeadm/app/util/env.go b/cmd/kubeadm/app/util/env.go
index e0f984798fe..d34a9a4ce2a 100644
--- a/cmd/kubeadm/app/util/env.go
+++ b/cmd/kubeadm/app/util/env.go
@@ -18,6 +18,7 @@ package util
 
 import (
 	"os"
+	"sort"
 	"strings"
 
 	v1 "k8s.io/api/core/v1"
@@ -63,5 +64,8 @@ func MergeKubeadmEnvVars(envList ...[]kubeadmapi.EnvVar) []v1.EnvVar {
 	for _, v := range m {
 		merged = append(merged, v)
 	}
+	sort.Slice(merged, func(i, j int) bool {
+		return merged[i].Name < merged[j].Name
+	})
 	return merged
 }
diff --git a/cmd/kubeadm/app/util/env_test.go b/cmd/kubeadm/app/util/env_test.go
index 0f788528ac3..7442edec49e 100644
--- a/cmd/kubeadm/app/util/env_test.go
+++ b/cmd/kubeadm/app/util/env_test.go
@@ -20,8 +20,6 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/stretchr/testify/assert"
-
 	v1 "k8s.io/api/core/v1"
 
 	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
@@ -41,10 +39,10 @@ func TestMergeKubeadmEnvVars(t *testing.T) {
 			name: "normal case without duplicated env",
 			proxyEnv: []kubeadmapi.EnvVar{
 				{
-					EnvVar: v1.EnvVar{Name: "Foo1", Value: "Bar1"},
+					EnvVar: v1.EnvVar{Name: "Foo2", Value: "Bar2"},
 				},
 				{
-					EnvVar: v1.EnvVar{Name: "Foo2", Value: "Bar2"},
+					EnvVar: v1.EnvVar{Name: "Foo1", Value: "Bar1"},
 				},
 			},
 			extraEnv: []kubeadmapi.EnvVar{
@@ -83,7 +81,7 @@ func TestMergeKubeadmEnvVars(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			envs := MergeKubeadmEnvVars(test.proxyEnv, test.extraEnv)
-			if !assert.ElementsMatch(t, envs, test.mergedEnv) {
+			if !reflect.DeepEqual(envs, test.mergedEnv) {
 				t.Errorf("expected env: %v, got: %v", test.mergedEnv, envs)
 			}
 		})