diff --git a/plugin/pkg/admission/defaulttolerationseconds/admission_test.go b/plugin/pkg/admission/defaulttolerationseconds/admission_test.go
index 33e82498d8e..391d374882a 100644
--- a/plugin/pkg/admission/defaulttolerationseconds/admission_test.go
+++ b/plugin/pkg/admission/defaulttolerationseconds/admission_test.go
@@ -33,13 +33,14 @@ func TestForgivenessAdmission(t *testing.T) {
 	}
 
 	handler := NewDefaultTolerationSeconds()
+	// NOTE: for anyone who want to modify this test, the order of tolerations matters!
 	tests := []struct {
 		description  string
 		requestedPod api.Pod
 		expectedPod  api.Pod
 	}{
 		{
-			description: "pod has no tolerations, expect add tolerations for `notReady:NoExecute` and `unreachable:NoExecute`",
+			description: "pod has no tolerations, expect add tolerations for `not-ready:NoExecute` and `unreachable:NoExecute`",
 			requestedPod: api.Pod{
 				Spec: api.PodSpec{},
 			},
@@ -63,7 +64,139 @@ func TestForgivenessAdmission(t *testing.T) {
 			},
 		},
 		{
-			description: "pod has tolerations, but none is for taint `notReady:NoExecute` or `unreachable:NoExecute`, expect add tolerations for `notReady:NoExecute` and `unreachable:NoExecute`",
+			description: "pod has alpha tolerations, expect add tolerations for `not-ready:NoExecute` and `unreachable:NoExecute`" +
+				", the alpha tolerations will not be touched",
+			requestedPod: api.Pod{
+				Spec: api.PodSpec{
+					Tolerations: []api.Toleration{
+						{
+							Key:               algorithm.DeprecatedTaintNodeNotReady,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+						{
+							Key:               algorithm.DeprecatedTaintNodeUnreachable,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+					},
+				},
+			},
+			expectedPod: api.Pod{
+				Spec: api.PodSpec{
+					Tolerations: []api.Toleration{
+						{
+							Key:               algorithm.DeprecatedTaintNodeNotReady,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+						{
+							Key:               algorithm.DeprecatedTaintNodeUnreachable,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+						{
+							Key:               algorithm.TaintNodeNotReady,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+						{
+							Key:               algorithm.TaintNodeUnreachable,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+					},
+				},
+			},
+		},
+		{
+			description: "pod has alpha not-ready toleration, expect add tolerations for `not-ready:NoExecute` and `unreachable:NoExecute`" +
+				", the alpha tolerations will not be touched",
+			requestedPod: api.Pod{
+				Spec: api.PodSpec{
+					Tolerations: []api.Toleration{
+						{
+							Key:               algorithm.DeprecatedTaintNodeNotReady,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+					},
+				},
+			},
+			expectedPod: api.Pod{
+				Spec: api.PodSpec{
+					Tolerations: []api.Toleration{
+						{
+							Key:               algorithm.DeprecatedTaintNodeNotReady,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+						{
+							Key:               algorithm.TaintNodeNotReady,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+						{
+							Key:               algorithm.TaintNodeUnreachable,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+					},
+				},
+			},
+		},
+		{
+			description: "pod has alpha unreachable toleration, expect add tolerations for `not-ready:NoExecute` and `unreachable:NoExecute`" +
+				", the alpha tolerations will not be touched",
+			requestedPod: api.Pod{
+				Spec: api.PodSpec{
+					Tolerations: []api.Toleration{
+						{
+							Key:               algorithm.DeprecatedTaintNodeUnreachable,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+					},
+				},
+			},
+			expectedPod: api.Pod{
+				Spec: api.PodSpec{
+					Tolerations: []api.Toleration{
+						{
+							Key:               algorithm.DeprecatedTaintNodeUnreachable,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+						{
+							Key:               algorithm.TaintNodeNotReady,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+						{
+							Key:               algorithm.TaintNodeUnreachable,
+							Operator:          api.TolerationOpExists,
+							Effect:            api.TaintEffectNoExecute,
+							TolerationSeconds: &defaultTolerationSeconds,
+						},
+					},
+				},
+			},
+		},
+		{
+			description: "pod has tolerations, but none is for taint `not-ready:NoExecute` or `unreachable:NoExecute`, expect add tolerations for `not-ready:NoExecute` and `unreachable:NoExecute`",
 			requestedPod: api.Pod{
 				Spec: api.PodSpec{
 					Tolerations: []api.Toleration{
@@ -104,7 +237,7 @@ func TestForgivenessAdmission(t *testing.T) {
 			},
 		},
 		{
-			description: "pod specified a toleration for taint `notReady:NoExecute`, expect add toleration for `unreachable:NoExecute`",
+			description: "pod specified a toleration for taint `not-ready:NoExecute`, expect add toleration for `unreachable:NoExecute`",
 			requestedPod: api.Pod{
 				Spec: api.PodSpec{
 					Tolerations: []api.Toleration{
@@ -137,7 +270,7 @@ func TestForgivenessAdmission(t *testing.T) {
 			},
 		},
 		{
-			description: "pod specified a toleration for taint `unreachable:NoExecute`, expect add toleration for `notReady:NoExecute`",
+			description: "pod specified a toleration for taint `unreachable:NoExecute`, expect add toleration for `not-ready:NoExecute`",
 			requestedPod: api.Pod{
 				Spec: api.PodSpec{
 					Tolerations: []api.Toleration{
@@ -170,7 +303,7 @@ func TestForgivenessAdmission(t *testing.T) {
 			},
 		},
 		{
-			description: "pod specified tolerations for both `notReady:NoExecute` and `unreachable:NoExecute`, expect no change",
+			description: "pod specified tolerations for both `not-ready:NoExecute` and `unreachable:NoExecute`, expect no change",
 			requestedPod: api.Pod{
 				Spec: api.PodSpec{
 					Tolerations: []api.Toleration{
@@ -209,7 +342,7 @@ func TestForgivenessAdmission(t *testing.T) {
 			},
 		},
 		{
-			description: "pod specified toleration for taint `unreachable`, expect add toleration for `notReady:NoExecute`",
+			description: "pod specified toleration for taint `unreachable`, expect add toleration for `not-ready:NoExecute`",
 			requestedPod: api.Pod{
 				Spec: api.PodSpec{
 					Tolerations: []api.Toleration{