reform all test files

Signed-off-by: Garrybest <garrybest@foxmail.com>
2026-01-26 05:14:13 +01:00 · 2021-12-11 19:27:05 +08:00
parent 0ff8ecb41e
commit cac3b9185b
17 changed files with 1387 additions and 1331 deletions
--- a/pkg/descheduler/descheduler_test.go
+++ b/pkg/descheduler/descheduler_test.go
@@ -55,7 +55,7 @@ func TestTaintsUpdated(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Unable to run descheduler strategies: %v", err)
 		}
-	case <-time.After(300 * time.Millisecond):
+	case <-time.After(1 * time.Second):
 		// Wait for few cycles and then verify the only pod still exists
 	}

--- a/pkg/descheduler/pod/pods_test.go
+++ b/pkg/descheduler/pod/pods_test.go
@@ -18,16 +18,15 @@ package pod

 import (
 	"context"
-	"fmt"
 	"reflect"
-	"strings"
 	"testing"

 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/test"
 )

@@ -39,19 +38,17 @@ var (
 func TestListPodsOnANode(t *testing.T) {
 	testCases := []struct {
 		name             string
-		pods             map[string][]v1.Pod
+		pods             []*v1.Pod
 		node             *v1.Node
 		labelSelector    *metav1.LabelSelector
 		expectedPodCount int
 	}{
 		{
 			name: "test listing pods on a node",
-			pods: map[string][]v1.Pod{
-				"n1": {
-					*test.BuildTestPod("pod1", 100, 0, "n1", nil),
-					*test.BuildTestPod("pod2", 100, 0, "n1", nil),
-				},
-				"n2": {*test.BuildTestPod("pod3", 100, 0, "n2", nil)},
+			pods: []*v1.Pod{
+				test.BuildTestPod("pod1", 100, 0, "n1", nil),
+				test.BuildTestPod("pod2", 100, 0, "n1", nil),
+				test.BuildTestPod("pod3", 100, 0, "n2", nil),
 			},
 			node:             test.BuildTestNode("n1", 2000, 3000, 10, nil),
 			labelSelector:    nil,
@@ -59,17 +56,15 @@ func TestListPodsOnANode(t *testing.T) {
 		},
 		{
 			name: "test listing pods with label selector",
-			pods: map[string][]v1.Pod{
-				"n1": {
-					*test.BuildTestPod("pod1", 100, 0, "n1", nil),
-					*test.BuildTestPod("pod2", 100, 0, "n1", func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("pod1", 100, 0, "n1", nil),
+				test.BuildTestPod("pod2", 100, 0, "n1", func(pod *v1.Pod) {
 					pod.Labels = map[string]string{"foo": "bar"}
 				}),
-					*test.BuildTestPod("pod3", 100, 0, "n1", func(pod *v1.Pod) {
+				test.BuildTestPod("pod3", 100, 0, "n1", func(pod *v1.Pod) {
 					pod.Labels = map[string]string{"foo": "bar1"}
 				}),
-				},
-				"n2": {*test.BuildTestPod("pod4", 100, 0, "n2", nil)},
+				test.BuildTestPod("pod4", 100, 0, "n2", nil),
 			},
 			node: test.BuildTestNode("n1", 2000, 3000, 10, nil),
 			labelSelector: &metav1.LabelSelector{
@@ -85,21 +80,38 @@ func TestListPodsOnANode(t *testing.T) {
 		},
 	}
 	for _, testCase := range testCases {
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			list := action.(core.ListAction)
-			fieldString := list.GetListRestrictions().Fields.String()
-			if strings.Contains(fieldString, "n1") {
-				return true, &v1.PodList{Items: testCase.pods["n1"]}, nil
-			} else if strings.Contains(fieldString, "n2") {
-				return true, &v1.PodList{Items: testCase.pods["n2"]}, nil
+		t.Run(testCase.name, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			objs = append(objs, testCase.node)
+			for _, pod := range testCase.pods {
+				objs = append(objs, pod)
 			}
-			return true, nil, fmt.Errorf("Failed to list: %v", list)
-		})
-		pods, _ := ListPodsOnANode(context.TODO(), fakeClient, testCase.node, WithLabelSelector(testCase.labelSelector))
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			filter, err := NewOptions().WithLabelSelector(testCase.labelSelector).BuildFilterFunc()
+			if err != nil {
+				t.Errorf("Build filter function error: %v", err)
+			}
+
+			pods, _ := ListPodsOnANode(testCase.node.Name, getPodsAssignedToNode, filter)
 			if len(pods) != testCase.expectedPodCount {
-			t.Errorf("expected %v pods on node %v, got %+v", testCase.expectedPodCount, testCase.node.Name, len(pods))
+				t.Errorf("Expected %v pods on node %v, got %+v", testCase.expectedPodCount, testCase.node.Name, len(pods))
 			}
+		})
 	}
 }

--- a/pkg/descheduler/strategies/duplicates_test.go
+++ b/pkg/descheduler/strategies/duplicates_test.go
@@ -25,10 +25,12 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )
@@ -43,7 +45,6 @@ func buildTestPodWithImage(podName, node, image string) *v1.Pod {
 }

 func TestFindDuplicatePods(t *testing.T) {
-	ctx := context.Background()
 	// first setup pods
 	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
 	node2 := test.BuildTestNode("n2", 2000, 3000, 10, nil)
@@ -173,91 +174,91 @@ func TestFindDuplicatePods(t *testing.T) {

 	testCases := []struct {
 		description             string
-		pods                    []v1.Pod
+		pods                    []*v1.Pod
 		nodes                   []*v1.Node
 		expectedEvictedPodCount uint
 		strategy                api.DeschedulerStrategy
 	}{
 		{
 			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet. 1 should be evicted.",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 1,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet, but ReplicaSet kind is excluded. 0 should be evicted.",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{RemoveDuplicates: &api.RemoveDuplicates{ExcludeOwnerKinds: []string{"ReplicaSet"}}}},
 		},
 		{
 			description:             "Three Pods in the `test` Namespace, bound to same ReplicaSet. 1 should be evicted.",
-			pods:                    []v1.Pod{*p8, *p9, *p10},
+			pods:                    []*v1.Pod{p8, p9, p10},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 1,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Three Pods in the `dev` Namespace, three Pods in the `test` Namespace. Bound to ReplicaSet with same name. 4 should be evicted.",
-			pods:                    []v1.Pod{*p1, *p2, *p3, *p8, *p9, *p10},
+			pods:                    []*v1.Pod{p1, p2, p3, p8, p9, p10},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 2,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Pods are: part of DaemonSet, with local storage, mirror pod annotation, critical pod annotation - none should be evicted.",
-			pods:                    []v1.Pod{*p4, *p5, *p6, *p7},
+			pods:                    []*v1.Pod{p4, p5, p6, p7},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Test all Pods: 4 should be evicted.",
-			pods:                    []v1.Pod{*p1, *p2, *p3, *p4, *p5, *p6, *p7, *p8, *p9, *p10},
+			pods:                    []*v1.Pod{p1, p2, p3, p4, p5, p6, p7, p8, p9, p10},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 2,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Pods with the same owner but different images should not be evicted",
-			pods:                    []v1.Pod{*p11, *p12},
+			pods:                    []*v1.Pod{p11, p12},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Pods with multiple containers should not match themselves",
-			pods:                    []v1.Pod{*p13},
+			pods:                    []*v1.Pod{p13},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Pods with matching ownerrefs and at not all matching image should not trigger an eviction",
-			pods:                    []v1.Pod{*p11, *p13},
+			pods:                    []*v1.Pod{p11, p13},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{},
 		},
 		{
 			description:             "Three pods in the `dev` Namespace, bound to same ReplicaSet. Only node available has a taint, and nodeFit set to true. 0 should be evicted.",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node3},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{NodeFit: true}},
 		},
 		{
 			description:             "Three pods in the `node-fit` Namespace, bound to same ReplicaSet, all with a nodeSelector. Only node available has an incorrect node label, and nodeFit set to true. 0 should be evicted.",
-			pods:                    []v1.Pod{*p15, *p16, *p17},
+			pods:                    []*v1.Pod{p15, p16, p17},
 			nodes:                   []*v1.Node{node1, node4},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{NodeFit: true}},
 		},
 		{
 			description:             "Three pods in the `node-fit` Namespace, bound to same ReplicaSet. Only node available is not schedulable, and nodeFit set to true. 0 should be evicted.",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node5},
 			expectedEvictedPodCount: 0,
 			strategy:                api.DeschedulerStrategy{Params: &api.StrategyParameters{NodeFit: true}},
@@ -266,10 +267,29 @@ func TestFindDuplicatePods(t *testing.T) {

 	for _, testCase := range testCases {
 		t.Run(testCase.description, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				return true, &v1.PodList{Items: testCase.pods}, nil
-			})
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range testCase.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range testCase.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
 				"v1",
@@ -282,7 +302,7 @@ func TestFindDuplicatePods(t *testing.T) {
 				false,
 			)

-			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor)
+			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor, getPodsAssignedToNode)
 			podsEvicted := podEvictor.TotalEvicted()
 			if podsEvicted != testCase.expectedEvictedPodCount {
 				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", testCase.description, testCase.expectedEvictedPodCount, podsEvicted)
@@ -293,8 +313,6 @@ func TestFindDuplicatePods(t *testing.T) {
 }

 func TestRemoveDuplicatesUniformly(t *testing.T) {
-	ctx := context.Background()
-
 	setRSOwnerRef2 := func(pod *v1.Pod) {
 		pod.ObjectMeta.OwnerReferences = []metav1.OwnerReference{
 			{Kind: "ReplicaSet", APIVersion: "v1", Name: "replicaset-2"},
@@ -420,24 +438,24 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {

 	testCases := []struct {
 		description             string
-		pods                    []v1.Pod
+		pods                    []*v1.Pod
 		nodes                   []*v1.Node
 		expectedEvictedPodCount uint
 		strategy                api.DeschedulerStrategy
 	}{
 		{
 			description: "Evict pods uniformly",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1) -> (3,3,3) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p3", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p4", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p5", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p6", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p7", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p8", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p9", 100, 0, "n3", test.SetRSOwnerRef),
+				test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p9", 100, 0, "n3", test.SetRSOwnerRef),
 			},
 			expectedEvictedPodCount: 2,
 			nodes: []*v1.Node{
@@ -449,17 +467,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly with one node left out",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1) -> (4,4,1) -> 1 eviction
-				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p3", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p4", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p5", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p6", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p7", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p8", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p9", 100, 0, "n3", test.SetRSOwnerRef),
+				test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p9", 100, 0, "n3", test.SetRSOwnerRef),
 			},
 			expectedEvictedPodCount: 1,
 			nodes: []*v1.Node{
@@ -470,17 +488,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly with two replica sets",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1) -> (3,3,3) -> 2 evictions
-				*test.BuildTestPod("p11", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p12", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p13", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p14", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p15", 100, 0, "n1", setTwoRSOwnerRef),
-				*test.BuildTestPod("p16", 100, 0, "n2", setTwoRSOwnerRef),
-				*test.BuildTestPod("p17", 100, 0, "n2", setTwoRSOwnerRef),
-				*test.BuildTestPod("p18", 100, 0, "n2", setTwoRSOwnerRef),
-				*test.BuildTestPod("p19", 100, 0, "n3", setTwoRSOwnerRef),
+				test.BuildTestPod("p11", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p12", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p13", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p14", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p15", 100, 0, "n1", setTwoRSOwnerRef),
+				test.BuildTestPod("p16", 100, 0, "n2", setTwoRSOwnerRef),
+				test.BuildTestPod("p17", 100, 0, "n2", setTwoRSOwnerRef),
+				test.BuildTestPod("p18", 100, 0, "n2", setTwoRSOwnerRef),
+				test.BuildTestPod("p19", 100, 0, "n3", setTwoRSOwnerRef),
 			},
 			expectedEvictedPodCount: 4,
 			nodes: []*v1.Node{
@@ -492,27 +510,27 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly with two owner references",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1) -> (3,3,3) -> 2 evictions
-				*test.BuildTestPod("p11", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p12", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p13", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p14", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p15", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p16", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p17", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p18", 100, 0, "n2", test.SetRSOwnerRef),
-				*test.BuildTestPod("p19", 100, 0, "n3", test.SetRSOwnerRef),
+				test.BuildTestPod("p11", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p12", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p13", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p14", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p15", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p16", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p17", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p18", 100, 0, "n2", test.SetRSOwnerRef),
+				test.BuildTestPod("p19", 100, 0, "n3", test.SetRSOwnerRef),
 				// (1,3,5) -> (3,3,3) -> 2 evictions
-				*test.BuildTestPod("p21", 100, 0, "n1", setRSOwnerRef2),
-				*test.BuildTestPod("p22", 100, 0, "n2", setRSOwnerRef2),
-				*test.BuildTestPod("p23", 100, 0, "n2", setRSOwnerRef2),
-				*test.BuildTestPod("p24", 100, 0, "n2", setRSOwnerRef2),
-				*test.BuildTestPod("p25", 100, 0, "n3", setRSOwnerRef2),
-				*test.BuildTestPod("p26", 100, 0, "n3", setRSOwnerRef2),
-				*test.BuildTestPod("p27", 100, 0, "n3", setRSOwnerRef2),
-				*test.BuildTestPod("p28", 100, 0, "n3", setRSOwnerRef2),
-				*test.BuildTestPod("p29", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p21", 100, 0, "n1", setRSOwnerRef2),
+				test.BuildTestPod("p22", 100, 0, "n2", setRSOwnerRef2),
+				test.BuildTestPod("p23", 100, 0, "n2", setRSOwnerRef2),
+				test.BuildTestPod("p24", 100, 0, "n2", setRSOwnerRef2),
+				test.BuildTestPod("p25", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p26", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p27", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p28", 100, 0, "n3", setRSOwnerRef2),
+				test.BuildTestPod("p29", 100, 0, "n3", setRSOwnerRef2),
 			},
 			expectedEvictedPodCount: 4,
 			nodes: []*v1.Node{
@@ -524,10 +542,10 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods with number of pods less than nodes",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (2,0,0) -> (1,1,0) -> 1 eviction
-				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
-				*test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 100, 0, "n1", test.SetRSOwnerRef),
 			},
 			expectedEvictedPodCount: 1,
 			nodes: []*v1.Node{
@@ -539,14 +557,14 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods with number of pods less than nodes, but ignore different pods with the same ownerref",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (1, 0, 0) for "bar","baz" images -> no eviction, even with a matching ownerKey
 				// (2, 0, 0) for "foo" image -> (1,1,0) - 1 eviction
 				// In this case the only "real" duplicates are p1 and p4, so one of those should be evicted
-				*buildTestPodWithImage("p1", "n1", "foo"),
-				*buildTestPodWithImage("p2", "n1", "bar"),
-				*buildTestPodWithImage("p3", "n1", "baz"),
-				*buildTestPodWithImage("p4", "n1", "foo"),
+				buildTestPodWithImage("p1", "n1", "foo"),
+				buildTestPodWithImage("p2", "n1", "bar"),
+				buildTestPodWithImage("p3", "n1", "baz"),
+				buildTestPodWithImage("p4", "n1", "foo"),
 			},
 			expectedEvictedPodCount: 1,
 			nodes: []*v1.Node{
@@ -558,9 +576,9 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods with a single pod with three nodes",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (2,0,0) -> (1,1,0) -> 1 eviction
-				*test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
+				test.BuildTestPod("p1", 100, 0, "n1", test.SetRSOwnerRef),
 			},
 			expectedEvictedPodCount: 0,
 			nodes: []*v1.Node{
@@ -572,17 +590,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly respecting taints",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1,0,0,0) -> (3,3,3,0,0,0) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "worker1", setTolerationsK1),
-				*test.BuildTestPod("p2", 100, 0, "worker1", setTolerationsK2),
-				*test.BuildTestPod("p3", 100, 0, "worker1", setTolerationsK1),
-				*test.BuildTestPod("p4", 100, 0, "worker1", setTolerationsK2),
-				*test.BuildTestPod("p5", 100, 0, "worker1", setTolerationsK1),
-				*test.BuildTestPod("p6", 100, 0, "worker2", setTolerationsK2),
-				*test.BuildTestPod("p7", 100, 0, "worker2", setTolerationsK1),
-				*test.BuildTestPod("p8", 100, 0, "worker2", setTolerationsK2),
-				*test.BuildTestPod("p9", 100, 0, "worker3", setTolerationsK1),
+				test.BuildTestPod("p1", 100, 0, "worker1", setTolerationsK1),
+				test.BuildTestPod("p2", 100, 0, "worker1", setTolerationsK2),
+				test.BuildTestPod("p3", 100, 0, "worker1", setTolerationsK1),
+				test.BuildTestPod("p4", 100, 0, "worker1", setTolerationsK2),
+				test.BuildTestPod("p5", 100, 0, "worker1", setTolerationsK1),
+				test.BuildTestPod("p6", 100, 0, "worker2", setTolerationsK2),
+				test.BuildTestPod("p7", 100, 0, "worker2", setTolerationsK1),
+				test.BuildTestPod("p8", 100, 0, "worker2", setTolerationsK2),
+				test.BuildTestPod("p9", 100, 0, "worker3", setTolerationsK1),
 			},
 			expectedEvictedPodCount: 2,
 			nodes: []*v1.Node{
@@ -597,17 +615,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly respecting RequiredDuringSchedulingIgnoredDuringExecution node affinity",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1,0,0,0) -> (3,3,3,0,0,0) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "worker1", setNotMasterNodeSelectorK1),
-				*test.BuildTestPod("p2", 100, 0, "worker1", setNotMasterNodeSelectorK2),
-				*test.BuildTestPod("p3", 100, 0, "worker1", setNotMasterNodeSelectorK1),
-				*test.BuildTestPod("p4", 100, 0, "worker1", setNotMasterNodeSelectorK2),
-				*test.BuildTestPod("p5", 100, 0, "worker1", setNotMasterNodeSelectorK1),
-				*test.BuildTestPod("p6", 100, 0, "worker2", setNotMasterNodeSelectorK2),
-				*test.BuildTestPod("p7", 100, 0, "worker2", setNotMasterNodeSelectorK1),
-				*test.BuildTestPod("p8", 100, 0, "worker2", setNotMasterNodeSelectorK2),
-				*test.BuildTestPod("p9", 100, 0, "worker3", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p1", 100, 0, "worker1", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p2", 100, 0, "worker1", setNotMasterNodeSelectorK2),
+				test.BuildTestPod("p3", 100, 0, "worker1", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p4", 100, 0, "worker1", setNotMasterNodeSelectorK2),
+				test.BuildTestPod("p5", 100, 0, "worker1", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p6", 100, 0, "worker2", setNotMasterNodeSelectorK2),
+				test.BuildTestPod("p7", 100, 0, "worker2", setNotMasterNodeSelectorK1),
+				test.BuildTestPod("p8", 100, 0, "worker2", setNotMasterNodeSelectorK2),
+				test.BuildTestPod("p9", 100, 0, "worker3", setNotMasterNodeSelectorK1),
 			},
 			expectedEvictedPodCount: 2,
 			nodes: []*v1.Node{
@@ -622,17 +640,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly respecting node selector",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1,0,0,0) -> (3,3,3,0,0,0) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p2", 100, 0, "worker1", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p3", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p4", 100, 0, "worker1", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p5", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p6", 100, 0, "worker2", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p7", 100, 0, "worker2", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p8", 100, 0, "worker2", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p9", 100, 0, "worker3", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p1", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p2", 100, 0, "worker1", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p3", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p4", 100, 0, "worker1", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p5", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p6", 100, 0, "worker2", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p7", 100, 0, "worker2", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p8", 100, 0, "worker2", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p9", 100, 0, "worker3", setWorkerLabelSelectorK1),
 			},
 			expectedEvictedPodCount: 2,
 			nodes: []*v1.Node{
@@ -647,17 +665,17 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 		},
 		{
 			description: "Evict pods uniformly respecting node selector with zero target nodes",
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				// (5,3,1,0,0,0) -> (3,3,3,0,0,0) -> 2 evictions
-				*test.BuildTestPod("p1", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p2", 100, 0, "worker1", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p3", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p4", 100, 0, "worker1", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p5", 100, 0, "worker1", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p6", 100, 0, "worker2", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p7", 100, 0, "worker2", setWorkerLabelSelectorK1),
-				*test.BuildTestPod("p8", 100, 0, "worker2", setWorkerLabelSelectorK2),
-				*test.BuildTestPod("p9", 100, 0, "worker3", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p1", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p2", 100, 0, "worker1", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p3", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p4", 100, 0, "worker1", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p5", 100, 0, "worker1", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p6", 100, 0, "worker2", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p7", 100, 0, "worker2", setWorkerLabelSelectorK1),
+				test.BuildTestPod("p8", 100, 0, "worker2", setWorkerLabelSelectorK2),
+				test.BuildTestPod("p9", 100, 0, "worker3", setWorkerLabelSelectorK1),
 			},
 			expectedEvictedPodCount: 0,
 			nodes: []*v1.Node{
@@ -674,10 +692,29 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {

 	for _, testCase := range testCases {
 		t.Run(testCase.description, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				return true, &v1.PodList{Items: testCase.pods}, nil
-			})
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range testCase.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range testCase.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
 				policyv1.SchemeGroupVersion.String(),
@@ -690,7 +727,7 @@ func TestRemoveDuplicatesUniformly(t *testing.T) {
 				false,
 			)

-			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor)
+			RemoveDuplicatePods(ctx, fakeClient, testCase.strategy, testCase.nodes, podEvictor, getPodsAssignedToNode)
 			podsEvicted := podEvictor.TotalEvicted()
 			if podsEvicted != testCase.expectedEvictedPodCount {
 				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", testCase.description, testCase.expectedEvictedPodCount, podsEvicted)
--- a/pkg/descheduler/strategies/failedpods_test.go
+++ b/pkg/descheduler/strategies/failedpods_test.go
@@ -4,15 +4,16 @@ import (
 	"context"
 	"testing"

-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-
 	v1 "k8s.io/api/core/v1"
 	policyv1 "k8s.io/api/policy/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )

@@ -21,8 +22,6 @@ var (
 )

 func TestRemoveFailedPods(t *testing.T) {
-	ctx := context.Background()
-
 	createStrategy := func(enabled, includingInitContainers bool, reasons, excludeKinds []string, minAgeSeconds *uint, nodeFit bool) api.DeschedulerStrategy {
 		return api.DeschedulerStrategy{
 			Enabled: enabled,
@@ -43,28 +42,28 @@ func TestRemoveFailedPods(t *testing.T) {
 		nodes                   []*v1.Node
 		strategy                api.DeschedulerStrategy
 		expectedEvictedPodCount uint
-		pods                    []v1.Pod
+		pods                    []*v1.Pod
 	}{
 		{
 			description:             "default empty strategy, 0 failures, 0 evictions",
 			strategy:                api.DeschedulerStrategy{},
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 0,
-			pods:                    []v1.Pod{}, // no pods come back with field selector phase=Failed
+			pods:                    []*v1.Pod{}, // no pods come back with field selector phase=Failed
 		},
 		{
 			description:             "0 failures, 0 evictions",
 			strategy:                createStrategy(true, false, nil, nil, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 0,
-			pods:                    []v1.Pod{}, // no pods come back with field selector phase=Failed
+			pods:                    []*v1.Pod{}, // no pods come back with field selector phase=Failed
 		},
 		{
 			description:             "1 container terminated with reason NodeAffinity, 1 eviction",
 			strategy:                createStrategy(true, false, nil, nil, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 1,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", nil, &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
 				}, nil),
@@ -75,7 +74,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, true, nil, nil, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 1,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
 				}, nil, nil),
@@ -86,7 +85,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, true, nil, nil, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 1,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", &v1.ContainerState{
 					Waiting: &v1.ContainerStateWaiting{Reason: "CreateContainerConfigError"},
 				}, nil, nil),
@@ -100,7 +99,7 @@ func TestRemoveFailedPods(t *testing.T) {
 				test.BuildTestNode("node2", 2000, 3000, 10, nil),
 			},
 			expectedEvictedPodCount: 2,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "CreateContainerConfigError"},
 				}, nil, nil),
@@ -114,7 +113,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, false, []string{"CreateContainerConfigError"}, nil, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 1,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", nil, &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "CreateContainerConfigError"},
 				}, nil),
@@ -125,7 +124,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, false, []string{"CreateContainerConfigError", "NodeAffinity"}, nil, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 1,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", nil, &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "CreateContainerConfigError"},
 				}, nil),
@@ -136,7 +135,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, false, []string{"CreateContainerConfigError"}, nil, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 0,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", nil, &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
 				}, nil),
@@ -147,7 +146,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, false, []string{"CreateContainerConfigError"}, nil, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 0,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", &v1.ContainerState{
 					Waiting: &v1.ContainerStateWaiting{Reason: "CreateContainerConfigError"},
 				}, nil, nil),
@@ -158,7 +157,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, false, nil, nil, &OneHourInSeconds, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 0,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", nil, &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
 				}, nil),
@@ -171,7 +170,7 @@ func TestRemoveFailedPods(t *testing.T) {
 				node.Spec.Unschedulable = true
 			})},
 			expectedEvictedPodCount: 0,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", nil, &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
 				}, nil),
@@ -182,7 +181,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, true, nil, []string{"ReplicaSet"}, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 0,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
 				}, nil, nil),
@@ -193,7 +192,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, true, nil, []string{"DaemonSet"}, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 1,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
 				}, nil, nil),
@@ -204,7 +203,7 @@ func TestRemoveFailedPods(t *testing.T) {
 			strategy:                createStrategy(true, true, nil, []string{"DaemonSet"}, nil, false),
 			nodes:                   []*v1.Node{test.BuildTestNode("node1", 2000, 3000, 10, nil)},
 			expectedEvictedPodCount: 0,
-			pods: []v1.Pod{
+			pods: []*v1.Pod{
 				buildTestPod("p1", "node1", &v1.ContainerState{
 					Terminated: &v1.ContainerStateTerminated{Reason: "NodeAffinity"},
 				}, nil, &metav1.Time{}),
@@ -212,10 +211,29 @@ func TestRemoveFailedPods(t *testing.T) {
 		},
 	}
 	for _, tc := range tests {
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: tc.pods}, nil
-		})
+		t.Run(tc.description, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -229,11 +247,12 @@ func TestRemoveFailedPods(t *testing.T) {
 				false,
 			)

-		RemoveFailedPods(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
+			RemoveFailedPods(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
 			actualEvictedPodCount := podEvictor.TotalEvicted()
 			if actualEvictedPodCount != tc.expectedEvictedPodCount {
 				t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
 			}
+		})
 	}
 }

@@ -273,7 +292,7 @@ func TestValidRemoveFailedPodsParams(t *testing.T) {
 	}
 }

-func buildTestPod(podName, nodeName string, initContainerState, containerState *v1.ContainerState, deletionTimestamp *metav1.Time) v1.Pod {
+func buildTestPod(podName, nodeName string, initContainerState, containerState *v1.ContainerState, deletionTimestamp *metav1.Time) *v1.Pod {
 	pod := test.BuildTestPod(podName, 1, 1, nodeName, func(p *v1.Pod) {
 		ps := v1.PodStatus{}

@@ -292,5 +311,5 @@ func buildTestPod(podName, nodeName string, initContainerState, containerState *
 	pod.ObjectMeta.OwnerReferences = test.GetReplicaSetOwnerRefList()
 	pod.ObjectMeta.SetCreationTimestamp(metav1.Now())
 	pod.DeletionTimestamp = deletionTimestamp
-	return *pod
+	return pod
 }
--- a/pkg/descheduler/strategies/node_affinity_test.go
+++ b/pkg/descheduler/strategies/node_affinity_test.go
@@ -24,15 +24,16 @@ import (
 	policyv1 "k8s.io/api/policy/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )

 func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
-	ctx := context.Background()
 	requiredDuringSchedulingIgnoredDuringExecutionStrategy := api.DeschedulerStrategy{
 		Enabled: true,
 		Params: &api.StrategyParameters{
@@ -63,7 +64,7 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 	unschedulableNodeWithLabels.Labels[nodeLabelKey] = nodeLabelValue
 	unschedulableNodeWithLabels.Spec.Unschedulable = true

-	addPodsToNode := func(node *v1.Node, deletionTimestamp *metav1.Time) []v1.Pod {
+	addPodsToNode := func(node *v1.Node, deletionTimestamp *metav1.Time) []*v1.Pod {
 		podWithNodeAffinity := test.BuildTestPod("podWithNodeAffinity", 100, 0, node.Name, nil)
 		podWithNodeAffinity.Spec.Affinity = &v1.Affinity{
 			NodeAffinity: &v1.NodeAffinity{
@@ -95,10 +96,10 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 		pod1.DeletionTimestamp = deletionTimestamp
 		pod2.DeletionTimestamp = deletionTimestamp

-		return []v1.Pod{
-			*podWithNodeAffinity,
-			*pod1,
-			*pod2,
+		return []*v1.Pod{
+			podWithNodeAffinity,
+			pod1,
+			pod2,
 		}
 	}

@@ -106,7 +107,7 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 	tests := []struct {
 		description                    string
 		nodes                          []*v1.Node
-		pods                           []v1.Pod
+		pods                           []*v1.Pod
 		strategy                       api.DeschedulerStrategy
 		expectedEvictedPodCount        uint
 		maxPodsToEvictPerNode          *uint
@@ -190,11 +191,29 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 	}

 	for _, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()

-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: tc.pods}, nil
-		})
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -208,10 +227,11 @@ func TestRemovePodsViolatingNodeAffinity(t *testing.T) {
 				false,
 			)

-		RemovePodsViolatingNodeAffinity(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
+			RemovePodsViolatingNodeAffinity(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
 			actualEvictedPodCount := podEvictor.TotalEvicted()
 			if actualEvictedPodCount != tc.expectedEvictedPodCount {
 				t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
 			}
+		})
 	}
 }
--- a/pkg/descheduler/strategies/node_taint_test.go
+++ b/pkg/descheduler/strategies/node_taint_test.go
@@ -9,10 +9,12 @@ import (
 	policyv1 "k8s.io/api/policy/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )
@@ -45,11 +47,10 @@ func addTolerationToPod(pod *v1.Pod, key, value string, index int) *v1.Pod {
 }

 func TestDeletePodsViolatingNodeTaints(t *testing.T) {
-	ctx := context.Background()
 	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
 	node1 = addTaintsToNode(node1, "testTaint", "test", []int{1})
 	node2 := test.BuildTestNode("n2", 2000, 3000, 10, nil)
-	node1 = addTaintsToNode(node2, "testingTaint", "testing", []int{1})
+	node2 = addTaintsToNode(node2, "testingTaint", "testing", []int{1})

 	node3 := test.BuildTestNode("n3", 2000, 3000, 10, func(node *v1.Node) {
 		node.ObjectMeta.Labels = map[string]string{
@@ -121,7 +122,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 	tests := []struct {
 		description                    string
 		nodes                          []*v1.Node
-		pods                           []v1.Pod
+		pods                           []*v1.Pod
 		evictLocalStoragePods          bool
 		evictSystemCriticalPods        bool
 		maxPodsToEvictPerNode          *uint
@@ -132,7 +133,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {

 		{
 			description:             "Pods not tolerating node taint should be evicted",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
@@ -140,7 +141,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:             "Pods with tolerations but not tolerating node taint should be evicted",
-			pods:                    []v1.Pod{*p1, *p3, *p4},
+			pods:                    []*v1.Pod{p1, p3, p4},
 			nodes:                   []*v1.Node{node1},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
@@ -148,7 +149,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:             "Only <maxPodsToEvictPerNode> number of Pods not tolerating node taint should be evicted",
-			pods:                    []v1.Pod{*p1, *p5, *p6},
+			pods:                    []*v1.Pod{p1, p5, p6},
 			nodes:                   []*v1.Node{node1},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
@@ -157,7 +158,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:                    "Only <maxNoOfPodsToEvictPerNamespace> number of Pods not tolerating node taint should be evicted",
-			pods:                           []v1.Pod{*p1, *p5, *p6},
+			pods:                           []*v1.Pod{p1, p5, p6},
 			nodes:                          []*v1.Node{node1},
 			evictLocalStoragePods:          false,
 			evictSystemCriticalPods:        false,
@@ -166,7 +167,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:             "Critical pods not tolerating node taint should not be evicted",
-			pods:                    []v1.Pod{*p7, *p8, *p9, *p10},
+			pods:                    []*v1.Pod{p7, p8, p9, p10},
 			nodes:                   []*v1.Node{node2},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
@@ -174,7 +175,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:             "Critical pods except storage pods not tolerating node taint should not be evicted",
-			pods:                    []v1.Pod{*p7, *p8, *p9, *p10},
+			pods:                    []*v1.Pod{p7, p8, p9, p10},
 			nodes:                   []*v1.Node{node2},
 			evictLocalStoragePods:   true,
 			evictSystemCriticalPods: false,
@@ -182,7 +183,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:             "Critical and non critical pods, only non critical pods not tolerating node taint should be evicted",
-			pods:                    []v1.Pod{*p7, *p8, *p10, *p11},
+			pods:                    []*v1.Pod{p7, p8, p10, p11},
 			nodes:                   []*v1.Node{node2},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
@@ -190,15 +191,15 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:             "Critical and non critical pods, pods not tolerating node taint should be evicted even if they are critical",
-			pods:                    []v1.Pod{*p2, *p7, *p9, *p10},
-			nodes:                   []*v1.Node{node2},
+			pods:                    []*v1.Pod{p2, p7, p9, p10},
+			nodes:                   []*v1.Node{node1, node2},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: true,
 			expectedEvictedPodCount: 2, //p2 and p7 are evicted
 		},
 		{
 			description:             "Pod p2 doesn't tolerate taint on it's node, but also doesn't tolerate taints on other nodes",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node2},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
@@ -207,7 +208,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:             "Pod p12 doesn't tolerate taint on it's node, but other nodes don't match it's selector",
-			pods:                    []v1.Pod{*p1, *p3, *p12},
+			pods:                    []*v1.Pod{p1, p3, p12},
 			nodes:                   []*v1.Node{node1, node3},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
@@ -216,7 +217,7 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 		},
 		{
 			description:             "Pod p2 doesn't tolerate taint on it's node, but other nodes are unschedulable",
-			pods:                    []v1.Pod{*p1, *p2, *p3},
+			pods:                    []*v1.Pod{p1, p2, p3},
 			nodes:                   []*v1.Node{node1, node4},
 			evictLocalStoragePods:   false,
 			evictSystemCriticalPods: false,
@@ -226,12 +227,30 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 	}

 	for _, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {

-		// create fake client
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: tc.pods}, nil
-		})
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -251,13 +270,13 @@ func TestDeletePodsViolatingNodeTaints(t *testing.T) {
 				},
 			}

-		RemovePodsViolatingNodeTaints(ctx, fakeClient, strategy, tc.nodes, podEvictor)
+			RemovePodsViolatingNodeTaints(ctx, fakeClient, strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
 			actualEvictedPodCount := podEvictor.TotalEvicted()
 			if actualEvictedPodCount != tc.expectedEvictedPodCount {
 				t.Errorf("Test %#v failed, Unexpected no of pods evicted: pods evicted: %d, expected: %d", tc.description, actualEvictedPodCount, tc.expectedEvictedPodCount)
 			}
+		})
 	}
-
 }

 func TestToleratesTaint(t *testing.T) {
--- a/pkg/descheduler/strategies/nodeutilization/highnodeutilization_test.go
+++ b/pkg/descheduler/strategies/nodeutilization/highnodeutilization_test.go
@@ -19,23 +19,24 @@ package nodeutilization
 import (
 	"context"
 	"fmt"
-	"strings"
 	"testing"

 	v1 "k8s.io/api/core/v1"
 	"k8s.io/api/policy/v1beta1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )

 func TestHighNodeUtilization(t *testing.T) {
-	ctx := context.Background()
 	n1NodeName := "n1"
 	n2NodeName := "n2"
 	n3NodeName := "n3"
@@ -46,8 +47,8 @@ func TestHighNodeUtilization(t *testing.T) {
 	testCases := []struct {
 		name                string
 		thresholds          api.ResourceThresholds
-		nodes               map[string]*v1.Node
-		pods                map[string]*v1.PodList
+		nodes               []*v1.Node
+		pods                []*v1.Pod
 		expectedPodsEvicted uint
 		evictedPods         []string
 	}{
@@ -57,36 +58,24 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  20,
 				v1.ResourcePods: 20,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, nil),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, nil),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
+			pods: []*v1.Pod{
 				// These won't be evicted.
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p8", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p9", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+				test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p9", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 0,
 		},
@@ -96,16 +85,14 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  40,
 				v1.ResourcePods: 40,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, nil),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, nil),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
+			pods: []*v1.Pod{
 				// These won't be evicted.
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Volumes = []v1.Volume{
@@ -121,29 +108,19 @@ func TestHighNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
 				// These won't be evicted.
-						*test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetDSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p5", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p8", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+				test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 0,
 		},
@@ -153,31 +130,19 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  20,
 				v1.ResourcePods: 20,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
+			pods: []*v1.Pod{
 				// These can't be evicted.
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
 				// These can't be evicted.
-						*test.BuildTestPod("p2", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p3", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n3NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+				test.BuildTestPod("p2", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n3NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 0,
 		},
@@ -187,38 +152,26 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  30,
 				v1.ResourcePods: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
 				// These won't be evicted.
-						*test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+				test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 2,
 			evictedPods:         []string{"p1", "p7"},
@@ -229,31 +182,19 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  30,
 				v1.ResourcePods: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 2000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 2000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 2000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 2000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 2000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 2000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p2", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p6", 400, 0, n3NodeName, test.SetRSOwnerRef),
-					},
-				},
+				test.BuildTestPod("p2", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n3NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 1,
 		},
@@ -262,39 +203,27 @@ func TestHighNodeUtilization(t *testing.T) {
 			thresholds: api.ResourceThresholds{
 				v1.ResourceCPU: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 2000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 2000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 2000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 2000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodPriority(pod, lowPriority)
 				}),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodPriority(pod, highPriority)
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
 				// These won't be evicted.
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p7", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p8", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p8", 400, 0, n2NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p9", 400, 0, n3NodeName, test.SetDSOwnerRef),
-					},
-				},
+				test.BuildTestPod("p9", 400, 0, n3NodeName, test.SetDSOwnerRef),
 			},
 			expectedPodsEvicted: 1,
 			evictedPods:         []string{"p1"},
@@ -304,36 +233,25 @@ func TestHighNodeUtilization(t *testing.T) {
 			thresholds: api.ResourceThresholds{
 				v1.ResourceCPU: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 3000, 3000, 10, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 3000, 3000, 5, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 3000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 3000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 3000, 3000, 5, nil),
+				test.BuildTestNode(n3NodeName, 3000, 3000, 10, test.SetNodeUnschedulable),
 			},
 			// All pods are assumed to be burstable (test.BuildTestNode always sets both cpu/memory resource requests to some value)
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.MakeBestEffortPod(pod)
 				}),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
 				// These won't be evicted.
-						*test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{},
-				},
+				test.BuildTestPod("p3", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 400, 0, n2NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 1,
 			evictedPods:         []string{"p1"},
@@ -344,57 +262,42 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:   20,
 				extendedResource: 40,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 100, 0, n1NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 100, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
 				// These won't be evicted
-						*test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
-							test.SetDSOwnerRef(pod)
-							test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
-						}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p3", 500, 0, n2NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p3", 500, 0, n2NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p4", 500, 0, n2NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p4", 500, 0, n2NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p5", 500, 0, n2NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p5", 500, 0, n2NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p6", 500, 0, n2NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 500, 0, n2NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
 			},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{},
-				},
-			},
 			expectedPodsEvicted: 2,
 			evictedPods:         []string{"p1", "p2"},
 		},
@@ -404,38 +307,27 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:   40,
 				extendedResource: 40,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 10, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
+			pods: []*v1.Pod{
 				//These won't be evicted
-						*test.BuildTestPod("p1", 100, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p1", 100, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 100, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p3", 500, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 500, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 500, 0, n2NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p6", 500, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {
-					Items: []v1.Pod{},
-				},
+				test.BuildTestPod("p3", 500, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 500, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 500, 0, n2NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p6", 500, 0, n2NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 0,
 		},
@@ -445,26 +337,20 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  30,
 				v1.ResourcePods: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, func(node *v1.Node) {
 					node.ObjectMeta.Labels = map[string]string{
 						nodeSelectorKey: nodeSelectorValue,
 					}
 				}),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, func(pod *v1.Pod) {
 					// A pod selecting nodes in the "west" datacenter
 					test.SetRSOwnerRef(pod)
 					pod.Spec.NodeSelector = map[string]string{
@@ -472,8 +358,6 @@ func TestHighNodeUtilization(t *testing.T) {
 					}
 				}),
 			},
-				},
-			},
 			expectedPodsEvicted: 1,
 		},
 		{
@@ -482,22 +366,16 @@ func TestHighNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  30,
 				v1.ResourcePods: 30,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p5", 400, 0, n2NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n2NodeName, func(pod *v1.Pod) {
 					// A pod selecting nodes in the "west" datacenter
 					test.SetRSOwnerRef(pod)
 					pod.Spec.NodeSelector = map[string]string{
@@ -505,43 +383,39 @@ func TestHighNodeUtilization(t *testing.T) {
 					}
 				}),
 			},
-				},
-			},
 			expectedPodsEvicted: 0,
 		},
 	}

-	for _, test := range testCases {
-		t.Run(test.name, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				list := action.(core.ListAction)
-				fieldString := list.GetListRestrictions().Fields.String()
-				if strings.Contains(fieldString, n1NodeName) {
-					return true, test.pods[n1NodeName], nil
+	for _, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range testCase.nodes {
+				objs = append(objs, node)
 			}
-				if strings.Contains(fieldString, n2NodeName) {
-					return true, test.pods[n2NodeName], nil
+			for _, pod := range testCase.pods {
+				objs = append(objs, pod)
 			}
-				if strings.Contains(fieldString, n3NodeName) {
-					return true, test.pods[n3NodeName], nil
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
 			}
-				return true, nil, fmt.Errorf("Failed to list: %v", list)
-			})
-			fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
-				getAction := action.(core.GetAction)
-				if node, exists := test.nodes[getAction.GetName()]; exists {
-					return true, node, nil
-				}
-				return true, nil, fmt.Errorf("Wrong node: %v", getAction.GetName())
-			})
+
 			podsForEviction := make(map[string]struct{})
-			for _, pod := range test.evictedPods {
+			for _, pod := range testCase.evictedPods {
 				podsForEviction[pod] = struct{}{}
 			}

 			evictionFailed := false
-			if len(test.evictedPods) > 0 {
+			if len(testCase.evictedPods) > 0 {
 				fakeClient.Fake.AddReactor("create", "pods", func(action core.Action) (bool, runtime.Object, error) {
 					getAction := action.(core.CreateAction)
 					obj := getAction.GetObject()
@@ -556,10 +430,31 @@ func TestHighNodeUtilization(t *testing.T) {
 				})
 			}

-			var nodes []*v1.Node
-			for _, node := range test.nodes {
-				nodes = append(nodes, node)
-			}
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())
+
+			//fakeClient := &fake.Clientset{}
+			//fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
+			//	list := action.(core.ListAction)
+			//	fieldString := list.GetListRestrictions().Fields.String()
+			//	if strings.Contains(fieldString, n1NodeName) {
+			//		return true, test.pods[n1NodeName], nil
+			//	}
+			//	if strings.Contains(fieldString, n2NodeName) {
+			//		return true, test.pods[n2NodeName], nil
+			//	}
+			//	if strings.Contains(fieldString, n3NodeName) {
+			//		return true, test.pods[n3NodeName], nil
+			//	}
+			//	return true, nil, fmt.Errorf("Failed to list: %v", list)
+			//})
+			//fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
+			//	getAction := action.(core.GetAction)
+			//	if node, exists := testCase.nodes[getAction.GetName()]; exists {
+			//		return true, node, nil
+			//	}
+			//	return true, nil, fmt.Errorf("Wrong node: %v", getAction.GetName())
+			//})

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -567,7 +462,7 @@ func TestHighNodeUtilization(t *testing.T) {
 				false,
 				nil,
 				nil,
-				nodes,
+				testCase.nodes,
 				false,
 				false,
 				false,
@@ -577,16 +472,16 @@ func TestHighNodeUtilization(t *testing.T) {
 				Enabled: true,
 				Params: &api.StrategyParameters{
 					NodeResourceUtilizationThresholds: &api.NodeResourceUtilizationThresholds{
-						Thresholds: test.thresholds,
+						Thresholds: testCase.thresholds,
 					},
 					NodeFit: true,
 				},
 			}
-			HighNodeUtilization(ctx, fakeClient, strategy, nodes, podEvictor)
+			HighNodeUtilization(ctx, fakeClient, strategy, testCase.nodes, podEvictor, getPodsAssignedToNode)

 			podsEvicted := podEvictor.TotalEvicted()
-			if test.expectedPodsEvicted != podsEvicted {
-				t.Errorf("Expected %v pods to be evicted but %v got evicted", test.expectedPodsEvicted, podsEvicted)
+			if testCase.expectedPodsEvicted != podsEvicted {
+				t.Errorf("Expected %v pods to be evicted but %v got evicted", testCase.expectedPodsEvicted, podsEvicted)
 			}
 			if evictionFailed {
 				t.Errorf("Pod evictions failed unexpectedly")
@@ -663,7 +558,6 @@ func TestValidateHighNodeUtilizationStrategyConfig(t *testing.T) {
 }

 func TestHighNodeUtilizationWithTaints(t *testing.T) {
-	ctx := context.Background()
 	strategy := api.DeschedulerStrategy{
 		Enabled: true,
 		Params: &api.StrategyParameters{
@@ -741,6 +635,9 @@ func TestHighNodeUtilizationWithTaints(t *testing.T) {

 	for _, item := range tests {
 		t.Run(item.name, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
 			var objs []runtime.Object
 			for _, node := range item.nodes {
 				objs = append(objs, node)
@@ -751,6 +648,16 @@ func TestHighNodeUtilizationWithTaints(t *testing.T) {
 			}

 			fakeClient := fake.NewSimpleClientset(objs...)
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -764,7 +671,7 @@ func TestHighNodeUtilizationWithTaints(t *testing.T) {
 				false,
 			)

-			HighNodeUtilization(ctx, fakeClient, strategy, item.nodes, podEvictor)
+			HighNodeUtilization(ctx, fakeClient, strategy, item.nodes, podEvictor, getPodsAssignedToNode)

 			if item.evictionsExpected != podEvictor.TotalEvicted() {
 				t.Errorf("Expected %v evictions, got %v", item.evictionsExpected, podEvictor.TotalEvicted())
--- a/pkg/descheduler/strategies/nodeutilization/lownodeutilization_test.go
+++ b/pkg/descheduler/strategies/nodeutilization/lownodeutilization_test.go
@@ -19,7 +19,6 @@ package nodeutilization
 import (
 	"context"
 	"fmt"
-	"strings"
 	"testing"

 	v1 "k8s.io/api/core/v1"
@@ -27,16 +26,18 @@ import (
 	"k8s.io/api/policy/v1beta1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
 	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )

 func TestLowNodeUtilization(t *testing.T) {
-	ctx := context.Background()
 	n1NodeName := "n1"
 	n2NodeName := "n2"
 	n3NodeName := "n3"
@@ -48,8 +49,8 @@ func TestLowNodeUtilization(t *testing.T) {
 	testCases := []struct {
 		name                         string
 		thresholds, targetThresholds api.ResourceThresholds
-		nodes                        map[string]*v1.Node
-		pods                         map[string]*v1.PodList
+		nodes                        []*v1.Node
+		pods                         []*v1.Pod
 		expectedPodsEvicted          uint
 		evictedPods                  []string
 	}{
@@ -63,20 +64,18 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  50,
 				v1.ResourcePods: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
+			pods: []*v1.Pod{
 				// These won't be evicted.
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Volumes = []v1.Volume{
@@ -92,20 +91,13 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p9", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {},
+				test.BuildTestPod("p9", 400, 0, n2NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 0,
 		},
@@ -119,22 +111,20 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  50,
 				v1.ResourcePods: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n1NodeName, test.SetRSOwnerRef),
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n1NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Volumes = []v1.Volume{
@@ -150,20 +140,13 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p9", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {},
+				test.BuildTestPod("p9", 400, 0, n2NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 4,
 		},
@@ -177,22 +160,20 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  50,
 				v1.ResourcePods: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 300, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 300, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 300, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 300, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 300, n1NodeName, test.SetRSOwnerRef),
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 300, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 300, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 300, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 300, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 300, n1NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p6", 400, 300, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p7", 400, 300, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 400, 300, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p7", 400, 300, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Volumes = []v1.Volume{
@@ -208,20 +189,13 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p8", 400, 300, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p8", 400, 300, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p9", 400, 2100, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {},
+				test.BuildTestPod("p9", 400, 2100, n2NodeName, test.SetRSOwnerRef),
 			},
 			// 4 pods available for eviction based on v1.ResourcePods, only 3 pods can be evicted before cpu is depleted
 			expectedPodsEvicted: 3,
@@ -236,40 +210,38 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  50,
 				v1.ResourcePods: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodPriority(pod, highPriority)
 				}),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodPriority(pod, highPriority)
 				}),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p3", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodPriority(pod, highPriority)
 				}),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodPriority(pod, highPriority)
 				}),
-						*test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodPriority(pod, lowPriority)
 				}),
 				// These won't be evicted.
-						*test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetDSOwnerRef(pod)
 					test.SetPodPriority(pod, highPriority)
 				}),
-						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					test.SetPodPriority(pod, lowPriority)
@@ -286,20 +258,13 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p9", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {},
+				test.BuildTestPod("p9", 400, 0, n2NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 4,
 		},
@@ -313,39 +278,37 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  50,
 				v1.ResourcePods: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
 			// All pods are assumed to be burstable (test.BuildTestNode always sets both cpu/memory resource requests to some value)
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.MakeBestEffortPod(pod)
 				}),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.MakeBestEffortPod(pod)
 				}),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p3", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 				}),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.MakeBestEffortPod(pod)
 				}),
-						*test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.MakeBestEffortPod(pod)
 				}),
 				// These won't be evicted.
-						*test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetDSOwnerRef(pod)
 				}),
-						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Volumes = []v1.Volume{
@@ -361,20 +324,13 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p9", 400, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {},
+				test.BuildTestPod("p9", 400, 0, n2NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 4,
 			evictedPods:         []string{"p1", "p2", "p4", "p5"},
@@ -389,45 +345,43 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourcePods:  50,
 				extendedResource: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 0, 0, n1NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with extended resource.
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p2", 0, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p2", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p3", 0, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p3", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p4", 0, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p4", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p5", 0, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p5", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-						*test.BuildTestPod("p6", 0, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					test.SetNormalOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),

-						*test.BuildTestPod("p7", 0, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p7", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
@@ -444,25 +398,18 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p8", 0, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p8", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p9", 0, 0, n2NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p9", 0, 0, n2NodeName, func(pod *v1.Pod) {
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
 			},
-				},
-				n3NodeName: {},
-			},
 			// 4 pods available for eviction based on v1.ResourcePods, only 3 pods can be evicted before extended resource is depleted
 			expectedPodsEvicted: 3,
 		},
@@ -476,29 +423,20 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourcePods:  50,
 				extendedResource: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, func(node *v1.Node) {
 					test.SetNodeExtendedResource(node, extendedResource, 8)
 				}),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
-				n3NodeName: test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, nil),
+				test.BuildTestNode(n3NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 0, 0, n1NodeName, func(pod *v1.Pod) {
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 0, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with extended resource.
 					test.SetRSOwnerRef(pod)
 					test.SetPodExtendedResourceRequest(pod, extendedResource, 1)
 				}),
-					},
-				},
-				n2NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p9", 0, 0, n2NodeName, test.SetRSOwnerRef),
-					},
-				},
-				n3NodeName: {},
+				test.BuildTestPod("p9", 0, 0, n2NodeName, test.SetRSOwnerRef),
 			},
 			// 0 pods available for eviction because there's no enough extended resource in node2
 			expectedPodsEvicted: 0,
@@ -513,21 +451,19 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  50,
 				v1.ResourcePods: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, test.SetNodeUnschedulable),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p5", 400, 0, n1NodeName, test.SetRSOwnerRef),
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p4", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p5", 400, 0, n1NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Volumes = []v1.Volume{
@@ -543,16 +479,13 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
 			},
-				},
-				n2NodeName: {},
-			},
 			expectedPodsEvicted: 0,
 		},
 		{
@@ -565,37 +498,35 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  50,
 				v1.ResourcePods: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					node.ObjectMeta.Labels = map[string]string{
 						nodeSelectorKey: notMatchingNodeSelectorValue,
 					}
 				}),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod selecting nodes in the "west" datacenter
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.NodeSelector = map[string]string{
 						nodeSelectorKey: nodeSelectorValue,
 					}
 				}),
-						*test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod selecting nodes in the "west" datacenter
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.NodeSelector = map[string]string{
 						nodeSelectorKey: nodeSelectorValue,
 					}
 				}),
-						*test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Volumes = []v1.Volume{
@@ -611,16 +542,13 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
 			},
-				},
-				n2NodeName: {},
-			},
 			expectedPodsEvicted: 3,
 		},
 		{
@@ -633,22 +561,20 @@ func TestLowNodeUtilization(t *testing.T) {
 				v1.ResourceCPU:  50,
 				v1.ResourcePods: 50,
 			},
-			nodes: map[string]*v1.Node{
-				n1NodeName: test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
-				n2NodeName: test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
+			nodes: []*v1.Node{
+				test.BuildTestNode(n1NodeName, 4000, 3000, 9, nil),
+				test.BuildTestNode(n2NodeName, 4000, 3000, 10, func(node *v1.Node) {
 					node.ObjectMeta.Labels = map[string]string{
 						nodeSelectorKey: notMatchingNodeSelectorValue,
 					}
 				}),
 			},
-			pods: map[string]*v1.PodList{
-				n1NodeName: {
-					Items: []v1.Pod{
-						*test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
-						*test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
+			pods: []*v1.Pod{
+				test.BuildTestPod("p1", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p2", 400, 0, n1NodeName, test.SetRSOwnerRef),
+				test.BuildTestPod("p3", 400, 0, n1NodeName, test.SetRSOwnerRef),
 				// These won't be evicted.
-						*test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p4", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with affinity to run in the "west" datacenter upon scheduling
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Affinity = &v1.Affinity{
@@ -669,7 +595,7 @@ func TestLowNodeUtilization(t *testing.T) {
 						},
 					}
 				}),
-						*test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p5", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with affinity to run in the "west" datacenter upon scheduling
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Affinity = &v1.Affinity{
@@ -690,8 +616,8 @@ func TestLowNodeUtilization(t *testing.T) {
 						},
 					}
 				}),
-						*test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
-						*test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p6", 400, 0, n1NodeName, test.SetDSOwnerRef),
+				test.BuildTestPod("p7", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A pod with local storage.
 					test.SetNormalOwnerRef(pod)
 					pod.Spec.Volumes = []v1.Volume{
@@ -707,17 +633,13 @@ func TestLowNodeUtilization(t *testing.T) {
 					// A Mirror Pod.
 					pod.Annotations = test.GetMirrorPodAnnotation()
 				}),
-						*test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
+				test.BuildTestPod("p8", 400, 0, n1NodeName, func(pod *v1.Pod) {
 					// A Critical Pod.
 					pod.Namespace = "kube-system"
 					priority := utils.SystemCriticalPriority
 					pod.Spec.Priority = &priority
 				}),
-					},
-				},
-				n2NodeName: {Items: []v1.Pod{
-					*test.BuildTestPod("p9", 0, 0, n2NodeName, test.SetRSOwnerRef),
-				}},
+				test.BuildTestPod("p9", 0, 0, n2NodeName, test.SetRSOwnerRef),
 			},
 			expectedPodsEvicted: 3,
 		},
@@ -725,28 +647,48 @@ func TestLowNodeUtilization(t *testing.T) {

 	for _, test := range testCases {
 		t.Run(test.name, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				list := action.(core.ListAction)
-				fieldString := list.GetListRestrictions().Fields.String()
-				if strings.Contains(fieldString, n1NodeName) {
-					return true, test.pods[n1NodeName], nil
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range test.nodes {
+				objs = append(objs, node)
 			}
-				if strings.Contains(fieldString, n2NodeName) {
-					return true, test.pods[n2NodeName], nil
+			for _, pod := range test.pods {
+				objs = append(objs, pod)
 			}
-				if strings.Contains(fieldString, n3NodeName) {
-					return true, test.pods[n3NodeName], nil
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
 			}
-				return true, nil, fmt.Errorf("Failed to list: %v", list)
-			})
-			fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
-				getAction := action.(core.GetAction)
-				if node, exists := test.nodes[getAction.GetName()]; exists {
-					return true, node, nil
-				}
-				return true, nil, fmt.Errorf("Wrong node: %v", getAction.GetName())
-			})
+
+			//fakeClient := &fake.Clientset{}
+			//fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
+			//	list := action.(core.ListAction)
+			//	fieldString := list.GetListRestrictions().Fields.String()
+			//	if strings.Contains(fieldString, n1NodeName) {
+			//		return true, test.pods[n1NodeName], nil
+			//	}
+			//	if strings.Contains(fieldString, n2NodeName) {
+			//		return true, test.pods[n2NodeName], nil
+			//	}
+			//	if strings.Contains(fieldString, n3NodeName) {
+			//		return true, test.pods[n3NodeName], nil
+			//	}
+			//	return true, nil, fmt.Errorf("Failed to list: %v", list)
+			//})
+			//fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
+			//	getAction := action.(core.GetAction)
+			//	if node, exists := test.nodes[getAction.GetName()]; exists {
+			//		return true, node, nil
+			//	}
+			//	return true, nil, fmt.Errorf("Wrong node: %v", getAction.GetName())
+			//})
 			podsForEviction := make(map[string]struct{})
 			for _, pod := range test.evictedPods {
 				podsForEviction[pod] = struct{}{}
@@ -768,10 +710,8 @@ func TestLowNodeUtilization(t *testing.T) {
 				})
 			}

-			var nodes []*v1.Node
-			for _, node := range test.nodes {
-				nodes = append(nodes, node)
-			}
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -779,7 +719,7 @@ func TestLowNodeUtilization(t *testing.T) {
 				false,
 				nil,
 				nil,
-				nodes,
+				test.nodes,
 				false,
 				false,
 				false,
@@ -795,7 +735,7 @@ func TestLowNodeUtilization(t *testing.T) {
 					NodeFit: true,
 				},
 			}
-			LowNodeUtilization(ctx, fakeClient, strategy, nodes, podEvictor)
+			LowNodeUtilization(ctx, fakeClient, strategy, test.nodes, podEvictor, getPodsAssignedToNode)

 			podsEvicted := podEvictor.TotalEvicted()
 			if test.expectedPodsEvicted != podsEvicted {
@@ -1073,6 +1013,16 @@ func TestLowNodeUtilizationWithTaints(t *testing.T) {
 			}

 			fakeClient := fake.NewSimpleClientset(objs...)
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -1086,7 +1036,7 @@ func TestLowNodeUtilizationWithTaints(t *testing.T) {
 				false,
 			)

-			LowNodeUtilization(ctx, fakeClient, strategy, item.nodes, podEvictor)
+			LowNodeUtilization(ctx, fakeClient, strategy, item.nodes, podEvictor, getPodsAssignedToNode)

 			if item.evictionsExpected != podEvictor.TotalEvicted() {
 				t.Errorf("Expected %v evictions, got %v", item.evictionsExpected, podEvictor.TotalEvicted())
--- a/pkg/descheduler/strategies/pod_antiaffinity_test.go
+++ b/pkg/descheduler/strategies/pod_antiaffinity_test.go
@@ -24,16 +24,17 @@ import (
 	policyv1 "k8s.io/api/policy/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/pkg/utils"
 	"sigs.k8s.io/descheduler/test"
 )

 func TestPodAntiAffinity(t *testing.T) {
-	ctx := context.Background()
 	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
 	node2 := test.BuildTestNode("n2", 2000, 3000, 10, func(node *v1.Node) {
 		node.ObjectMeta.Labels = map[string]string{
@@ -106,55 +107,55 @@ func TestPodAntiAffinity(t *testing.T) {
 		description                    string
 		maxPodsToEvictPerNode          *uint
 		maxNoOfPodsToEvictPerNamespace *uint
-		pods                           []v1.Pod
+		pods                           []*v1.Pod
 		expectedEvictedPodCount        uint
 		nodeFit                        bool
 		nodes                          []*v1.Node
 	}{
 		{
 			description:             "Maximum pods to evict - 0",
-			pods:                    []v1.Pod{*p1, *p2, *p3, *p4},
+			pods:                    []*v1.Pod{p1, p2, p3, p4},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 3,
 		},
 		{
 			description:             "Maximum pods to evict - 3",
 			maxPodsToEvictPerNode:   &uint3,
-			pods:                    []v1.Pod{*p1, *p2, *p3, *p4},
+			pods:                    []*v1.Pod{p1, p2, p3, p4},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 3,
 		},
 		{
 			description:                    "Maximum pods to evict (maxPodsToEvictPerNamespace=3) - 3",
 			maxNoOfPodsToEvictPerNamespace: &uint3,
-			pods:                           []v1.Pod{*p1, *p2, *p3, *p4},
+			pods:                           []*v1.Pod{p1, p2, p3, p4},
 			nodes:                          []*v1.Node{node1},
 			expectedEvictedPodCount:        3,
 		},
 		{
 			description:             "Evict only 1 pod after sorting",
-			pods:                    []v1.Pod{*p5, *p6, *p7},
+			pods:                    []*v1.Pod{p5, p6, p7},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
 		{
 			description:             "Evicts pod that conflicts with critical pod (but does not evict critical pod)",
 			maxPodsToEvictPerNode:   &uint1,
-			pods:                    []v1.Pod{*p1, *nonEvictablePod},
+			pods:                    []*v1.Pod{p1, nonEvictablePod},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
 		{
 			description:             "Evicts pod that conflicts with critical pod (but does not evict critical pod)",
 			maxPodsToEvictPerNode:   &uint1,
-			pods:                    []v1.Pod{*p1, *nonEvictablePod},
+			pods:                    []*v1.Pod{p1, nonEvictablePod},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
 		{
 			description:             "Won't evict pods because node selectors don't match available nodes",
 			maxPodsToEvictPerNode:   &uint1,
-			pods:                    []v1.Pod{*p8, *nonEvictablePod},
+			pods:                    []*v1.Pod{p8, nonEvictablePod},
 			nodes:                   []*v1.Node{node1, node2},
 			expectedEvictedPodCount: 0,
 			nodeFit:                 true,
@@ -162,28 +163,44 @@ func TestPodAntiAffinity(t *testing.T) {
 		{
 			description:             "Won't evict pods because only other node is not schedulable",
 			maxPodsToEvictPerNode:   &uint1,
-			pods:                    []v1.Pod{*p8, *nonEvictablePod},
+			pods:                    []*v1.Pod{p8, nonEvictablePod},
 			nodes:                   []*v1.Node{node1, node3},
 			expectedEvictedPodCount: 0,
 			nodeFit:                 true,
 		},
 		{
 			description:             "No pod to evicted since all pod terminating",
-			pods:                    []v1.Pod{*p9, *p10},
+			pods:                    []*v1.Pod{p9, p10},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 		},
 	}

 	for _, test := range tests {
-		// create fake client
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: test.pods}, nil
-		})
-		fakeClient.Fake.AddReactor("get", "nodes", func(action core.Action) (bool, runtime.Object, error) {
-			return true, node1, nil
-		})
+		t.Run(test.description, func(t *testing.T) {
+
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range test.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range test.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -202,11 +219,12 @@ func TestPodAntiAffinity(t *testing.T) {
 				},
 			}

-		RemovePodsViolatingInterPodAntiAffinity(ctx, fakeClient, strategy, test.nodes, podEvictor)
+			RemovePodsViolatingInterPodAntiAffinity(ctx, fakeClient, strategy, test.nodes, podEvictor, getPodsAssignedToNode)
 			podsEvicted := podEvictor.TotalEvicted()
 			if podsEvicted != test.expectedEvictedPodCount {
 				t.Errorf("Unexpected no of pods evicted: pods evicted: %d, expected: %d", podsEvicted, test.expectedEvictedPodCount)
 			}
+		})
 	}
 }

--- a/pkg/descheduler/strategies/pod_lifetime_test.go
+++ b/pkg/descheduler/strategies/pod_lifetime_test.go
@@ -25,15 +25,16 @@ import (
 	policyv1 "k8s.io/api/policy/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )

 func TestPodLifeTime(t *testing.T) {
-	ctx := context.Background()
 	node1 := test.BuildTestNode("n1", 2000, 3000, 10, nil)
 	olderPodCreationTime := metav1.NewTime(time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC))
 	newerPodCreationTime := metav1.NewTime(time.Now())
@@ -140,7 +141,7 @@ func TestPodLifeTime(t *testing.T) {
 	testCases := []struct {
 		description             string
 		strategy                api.DeschedulerStrategy
-		pods                    []v1.Pod
+		pods                    []*v1.Pod
 		nodes                   []*v1.Node
 		expectedEvictedPodCount uint
 		ignorePvcPods           bool
@@ -153,7 +154,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			pods:                    []v1.Pod{*p1, *p2},
+			pods:                    []*v1.Pod{p1, p2},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
@@ -165,7 +166,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			pods:                    []v1.Pod{*p3, *p4},
+			pods:                    []*v1.Pod{p3, p4},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 		},
@@ -177,7 +178,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			pods:                    []v1.Pod{*p5, *p6},
+			pods:                    []*v1.Pod{p5, p6},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
@@ -189,7 +190,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			pods:                    []v1.Pod{*p7, *p8},
+			pods:                    []*v1.Pod{p7, p8},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 		},
@@ -204,7 +205,7 @@ func TestPodLifeTime(t *testing.T) {
 					},
 				},
 			},
-			pods:                    []v1.Pod{*p9, *p10},
+			pods:                    []*v1.Pod{p9, p10},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
@@ -216,7 +217,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			pods:                    []v1.Pod{*p11},
+			pods:                    []*v1.Pod{p11},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 			ignorePvcPods:           true,
@@ -229,7 +230,7 @@ func TestPodLifeTime(t *testing.T) {
 					PodLifeTime: &api.PodLifeTime{MaxPodLifeTimeSeconds: &maxLifeTime},
 				},
 			},
-			pods:                    []v1.Pod{*p11},
+			pods:                    []*v1.Pod{p11},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
@@ -244,7 +245,7 @@ func TestPodLifeTime(t *testing.T) {
 					},
 				},
 			},
-			pods:                    []v1.Pod{*p12, *p13},
+			pods:                    []*v1.Pod{p12, p13},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 1,
 		},
@@ -259,17 +260,36 @@ func TestPodLifeTime(t *testing.T) {
 					},
 				},
 			},
-			pods:                    []v1.Pod{*p14, *p15},
+			pods:                    []*v1.Pod{p14, p15},
 			nodes:                   []*v1.Node{node1},
 			expectedEvictedPodCount: 0,
 		},
 	}

 	for _, tc := range testCases {
-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: tc.pods}, nil
-		})
+		t.Run(tc.description, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -283,11 +303,11 @@ func TestPodLifeTime(t *testing.T) {
 				tc.ignorePvcPods,
 			)

-		PodLifeTime(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
+			PodLifeTime(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
 			podsEvicted := podEvictor.TotalEvicted()
 			if podsEvicted != tc.expectedEvictedPodCount {
 				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", tc.description, tc.expectedEvictedPodCount, podsEvicted)
 			}
+		})
 	}
-
 }
--- a/pkg/descheduler/strategies/toomanyrestarts_test.go
+++ b/pkg/descheduler/strategies/toomanyrestarts_test.go
@@ -18,23 +18,24 @@ package strategies

 import (
 	"context"
-	"testing"
-
 	"fmt"
+	"testing"

 	v1 "k8s.io/api/core/v1"
 	policyv1 "k8s.io/api/policy/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )

-func initPods(node *v1.Node) []v1.Pod {
-	pods := make([]v1.Pod, 0)
+func initPods(node *v1.Node) []*v1.Pod {
+	pods := make([]*v1.Pod, 0)

 	for i := int32(0); i <= 9; i++ {
 		pod := test.BuildTestPod(fmt.Sprintf("pod-%d", i), 100, 0, node.Name, nil)
@@ -56,7 +57,7 @@ func initPods(node *v1.Node) []v1.Pod {
 				},
 			},
 		}
-		pods = append(pods, *pod)
+		pods = append(pods, pod)
 	}

 	// The following 3 pods won't get evicted.
@@ -81,8 +82,6 @@ func initPods(node *v1.Node) []v1.Pod {
 }

 func TestRemovePodsHavingTooManyRestarts(t *testing.T) {
-	ctx := context.Background()
-
 	node1 := test.BuildTestNode("node1", 2000, 3000, 10, nil)
 	node2 := test.BuildTestNode("node2", 2000, 3000, 10, func(node *v1.Node) {
 		node.Spec.Taints = []v1.Taint{
@@ -203,11 +202,30 @@ func TestRemovePodsHavingTooManyRestarts(t *testing.T) {
 	}

 	for _, tc := range tests {
+		t.Run(tc.description, func(t *testing.T) {

-		fakeClient := &fake.Clientset{}
-		fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-			return true, &v1.PodList{Items: pods}, nil
-		})
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
+			}
+			for _, pod := range pods {
+				objs = append(objs, pod)
+			}
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -221,11 +239,11 @@ func TestRemovePodsHavingTooManyRestarts(t *testing.T) {
 				false,
 			)

-		RemovePodsHavingTooManyRestarts(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
+			RemovePodsHavingTooManyRestarts(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
 			actualEvictedPodCount := podEvictor.TotalEvicted()
 			if actualEvictedPodCount != tc.expectedEvictedPodCount {
 				t.Errorf("Test %#v failed, expected %v pod evictions, but got %v pod evictions\n", tc.description, tc.expectedEvictedPodCount, actualEvictedPodCount)
 			}
+		})
 	}
-
 }
--- a/pkg/descheduler/strategies/topologyspreadconstraint_test.go
+++ b/pkg/descheduler/strategies/topologyspreadconstraint_test.go
@@ -8,15 +8,16 @@ import (
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes/fake"
-	core "k8s.io/client-go/testing"
+
 	"sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
+	podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
 	"sigs.k8s.io/descheduler/test"
 )

 func TestTopologySpreadConstraint(t *testing.T) {
-	ctx := context.Background()
 	testCases := []struct {
 		name                 string
 		pods                 []*v1.Pod
@@ -870,17 +871,29 @@ func TestTopologySpreadConstraint(t *testing.T) {

 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {
-			fakeClient := &fake.Clientset{}
-			fakeClient.Fake.AddReactor("list", "pods", func(action core.Action) (bool, runtime.Object, error) {
-				podList := make([]v1.Pod, 0, len(tc.pods))
-				for _, pod := range tc.pods {
-					podList = append(podList, *pod)
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			var objs []runtime.Object
+			for _, node := range tc.nodes {
+				objs = append(objs, node)
 			}
-				return true, &v1.PodList{Items: podList}, nil
-			})
-			fakeClient.Fake.AddReactor("list", "namespaces", func(action core.Action) (bool, runtime.Object, error) {
-				return true, &v1.NamespaceList{Items: []v1.Namespace{{ObjectMeta: metav1.ObjectMeta{Name: "ns1", Namespace: "ns1"}}}}, nil
-			})
+			for _, pod := range tc.pods {
+				objs = append(objs, pod)
+			}
+			objs = append(objs, &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "ns1"}})
+			fakeClient := fake.NewSimpleClientset(objs...)
+
+			sharedInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
+			podInformer := sharedInformerFactory.Core().V1().Pods()
+
+			getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+			if err != nil {
+				t.Errorf("Build get pods assigned to node function error: %v", err)
+			}
+
+			sharedInformerFactory.Start(ctx.Done())
+			sharedInformerFactory.WaitForCacheSync(ctx.Done())

 			podEvictor := evictions.NewPodEvictor(
 				fakeClient,
@@ -893,7 +906,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 				false,
 				false,
 			)
-			RemovePodsViolatingTopologySpreadConstraint(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor)
+			RemovePodsViolatingTopologySpreadConstraint(ctx, fakeClient, tc.strategy, tc.nodes, podEvictor, getPodsAssignedToNode)
 			podsEvicted := podEvictor.TotalEvicted()
 			if podsEvicted != tc.expectedEvictedCount {
 				t.Errorf("Test error for description: %s. Expected evicted pods count %v, got %v", tc.name, tc.expectedEvictedCount, podsEvicted)
--- a/test/e2e/e2e_duplicatepods_test.go
+++ b/test/e2e/e2e_duplicatepods_test.go
@@ -39,7 +39,7 @@ import (
 func TestRemoveDuplicates(t *testing.T) {
 	ctx := context.Background()

-	clientSet, _, stopCh := initializeClient(t)
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
@@ -164,6 +164,7 @@ func TestRemoveDuplicates(t *testing.T) {
 				},
 				workerNodes,
 				podEvictor,
+				getPodsAssignedToNode,
 			)

 			waitForTerminatingPodsToDisappear(ctx, t, clientSet, testNamespace.Name)
--- a/test/e2e/e2e_failedpods_test.go
+++ b/test/e2e/e2e_failedpods_test.go
@@ -21,7 +21,7 @@ var oneHourPodLifetimeSeconds uint = 3600

 func TestFailedPods(t *testing.T) {
 	ctx := context.Background()
-	clientSet, _, stopCh := initializeClient(t)
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
 	if err != nil {
@@ -95,6 +95,7 @@ func TestFailedPods(t *testing.T) {
 				},
 				nodes,
 				podEvictor,
+				getPodsAssignedToNode,
 			)
 			t.Logf("Finished RemoveFailedPods strategy for %s", name)

--- a/test/e2e/e2e_test.go
+++ b/test/e2e/e2e_test.go
@@ -108,7 +108,7 @@ func RcByNameContainer(name, namespace string, replicas int32, labels map[string
 	}
 }

-func initializeClient(t *testing.T) (clientset.Interface, coreinformers.NodeInformer, chan struct{}) {
+func initializeClient(t *testing.T) (clientset.Interface, coreinformers.NodeInformer, podutil.GetPodsAssignedToNodeFunc, chan struct{}) {
 	clientSet, err := client.CreateClient(os.Getenv("KUBECONFIG"))
 	if err != nil {
 		t.Errorf("Error during client creation with %v", err)
@@ -117,12 +117,18 @@ func initializeClient(t *testing.T) (clientset.Interface, coreinformers.NodeInfo
 	stopChannel := make(chan struct{})

 	sharedInformerFactory := informers.NewSharedInformerFactory(clientSet, 0)
+	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
+	podInformer := sharedInformerFactory.Core().V1().Pods()
+
+	getPodsAssignedToNode, err := podutil.BuildGetPodsAssignedToNodeFunc(podInformer)
+	if err != nil {
+		t.Errorf("build get pods assigned to node function error: %v", err)
+	}
+
 	sharedInformerFactory.Start(stopChannel)
 	sharedInformerFactory.WaitForCacheSync(stopChannel)

-	nodeInformer := sharedInformerFactory.Core().V1().Nodes()
-
-	return clientSet, nodeInformer, stopChannel
+	return clientSet, nodeInformer, getPodsAssignedToNode, stopChannel
 }

 func runPodLifetimeStrategy(
@@ -135,6 +141,7 @@ func runPodLifetimeStrategy(
 	priority *int32,
 	evictCritical bool,
 	labelSelector *metav1.LabelSelector,
+	getPodsAssignedToNode podutil.GetPodsAssignedToNodeFunc,
 ) {
 	// Run descheduler.
 	evictionPolicyGroupVersion, err := eutils.SupportEviction(clientset)
@@ -173,6 +180,7 @@ func runPodLifetimeStrategy(
 			evictCritical,
 			false,
 		),
+		getPodsAssignedToNode,
 	)
 }

@@ -202,7 +210,7 @@ func intersectStrings(lista, listb []string) []string {
 func TestLowNodeUtilization(t *testing.T) {
 	ctx := context.Background()

-	clientSet, _, stopCh := initializeClient(t)
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
@@ -293,7 +301,12 @@ func TestLowNodeUtilization(t *testing.T) {
 	// Run LowNodeUtilization strategy
 	podEvictor := initPodEvictorOrFail(t, clientSet, nodes)

-	podsOnMosttUtilizedNode, err := podutil.ListPodsOnANode(ctx, clientSet, workerNodes[0], podutil.WithFilter(podEvictor.Evictable().IsEvictable))
+	podFilter, err := podutil.NewOptions().WithFilter(podEvictor.Evictable().IsEvictable).BuildFilterFunc()
+	if err != nil {
+		t.Errorf("Error initializing pod filter function, %v", err)
+	}
+
+	podsOnMosttUtilizedNode, err := podutil.ListPodsOnANode(workerNodes[0].Name, getPodsAssignedToNode, podFilter)
 	if err != nil {
 		t.Errorf("Error listing pods on a node %v", err)
 	}
@@ -318,11 +331,17 @@ func TestLowNodeUtilization(t *testing.T) {
 		},
 		workerNodes,
 		podEvictor,
+		getPodsAssignedToNode,
 	)

 	waitForTerminatingPodsToDisappear(ctx, t, clientSet, rc.Namespace)

-	podsOnMosttUtilizedNode, err = podutil.ListPodsOnANode(ctx, clientSet, workerNodes[0], podutil.WithFilter(podEvictor.Evictable().IsEvictable))
+	podFilter, err = podutil.NewOptions().WithFilter(podEvictor.Evictable().IsEvictable).BuildFilterFunc()
+	if err != nil {
+		t.Errorf("Error initializing pod filter function, %v", err)
+	}
+
+	podsOnMosttUtilizedNode, err = podutil.ListPodsOnANode(workerNodes[0].Name, getPodsAssignedToNode, podFilter)
 	if err != nil {
 		t.Errorf("Error listing pods on a node %v", err)
 	}
@@ -339,7 +358,7 @@ func TestLowNodeUtilization(t *testing.T) {
 func TestNamespaceConstraintsInclude(t *testing.T) {
 	ctx := context.Background()

-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -374,7 +393,7 @@ func TestNamespaceConstraintsInclude(t *testing.T) {
 	t.Logf("set the strategy to delete pods from %v namespace", rc.Namespace)
 	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, &deschedulerapi.Namespaces{
 		Include: []string{rc.Namespace},
-	}, "", nil, false, nil)
+	}, "", nil, false, nil, getPodsAssignedToNode)

 	// All pods are supposed to be deleted, wait until all the old pods are deleted
 	if err := wait.PollImmediate(time.Second, 20*time.Second, func() (bool, error) {
@@ -410,7 +429,7 @@ func TestNamespaceConstraintsInclude(t *testing.T) {
 func TestNamespaceConstraintsExclude(t *testing.T) {
 	ctx := context.Background()

-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -445,7 +464,7 @@ func TestNamespaceConstraintsExclude(t *testing.T) {
 	t.Logf("set the strategy to delete pods from namespaces except the %v namespace", rc.Namespace)
 	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, &deschedulerapi.Namespaces{
 		Exclude: []string{rc.Namespace},
-	}, "", nil, false, nil)
+	}, "", nil, false, nil, getPodsAssignedToNode)

 	t.Logf("Waiting 10s")
 	time.Sleep(10 * time.Second)
@@ -477,7 +496,7 @@ func testEvictSystemCritical(t *testing.T, isPriorityClass bool) {
 	var lowPriority = int32(500)
 	ctx := context.Background()

-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -558,9 +577,9 @@ func testEvictSystemCritical(t *testing.T, isPriorityClass bool) {
 	t.Logf("Existing pods: %v", initialPodNames)

 	if isPriorityClass {
-		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, highPriorityClass.Name, nil, true, nil)
+		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, highPriorityClass.Name, nil, true, nil, getPodsAssignedToNode)
 	} else {
-		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", &highPriority, true, nil)
+		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", &highPriority, true, nil, getPodsAssignedToNode)
 	}

 	// All pods are supposed to be deleted, wait until all pods in the test namespace are terminating
@@ -607,7 +626,7 @@ func testPriority(t *testing.T, isPriorityClass bool) {
 	var lowPriority = int32(500)
 	ctx := context.Background()

-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -677,10 +696,10 @@ func testPriority(t *testing.T, isPriorityClass bool) {

 	if isPriorityClass {
 		t.Logf("set the strategy to delete pods with priority lower than priority class %s", highPriorityClass.Name)
-		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, highPriorityClass.Name, nil, false, nil)
+		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, highPriorityClass.Name, nil, false, nil, getPodsAssignedToNode)
 	} else {
 		t.Logf("set the strategy to delete pods with priority lower than %d", highPriority)
-		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", &highPriority, false, nil)
+		runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", &highPriority, false, nil, getPodsAssignedToNode)
 	}

 	t.Logf("Waiting 10s")
@@ -736,7 +755,7 @@ func testPriority(t *testing.T, isPriorityClass bool) {
 func TestPodLabelSelector(t *testing.T) {
 	ctx := context.Background()

-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	testNamespace := &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "e2e-" + strings.ToLower(t.Name())}}
@@ -784,7 +803,7 @@ func TestPodLabelSelector(t *testing.T) {
 	t.Logf("Pods not expected to be evicted: %v, pods expected to be evicted: %v", expectReservePodNames, expectEvictPodNames)

 	t.Logf("set the strategy to delete pods with label test:podlifetime-evict")
-	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", nil, false, &metav1.LabelSelector{MatchLabels: map[string]string{"test": "podlifetime-evict"}})
+	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", nil, false, &metav1.LabelSelector{MatchLabels: map[string]string{"test": "podlifetime-evict"}}, getPodsAssignedToNode)

 	t.Logf("Waiting 10s")
 	time.Sleep(10 * time.Second)
@@ -839,7 +858,7 @@ func TestPodLabelSelector(t *testing.T) {
 func TestEvictAnnotation(t *testing.T) {
 	ctx := context.Background()

-	clientSet, nodeInformer, stopCh := initializeClient(t)
+	clientSet, nodeInformer, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
@@ -894,7 +913,7 @@ func TestEvictAnnotation(t *testing.T) {
 	t.Logf("Existing pods: %v", initialPodNames)

 	t.Log("Running PodLifetime strategy")
-	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", nil, false, nil)
+	runPodLifetimeStrategy(ctx, t, clientSet, nodeInformer, nil, "", nil, false, nil, getPodsAssignedToNode)

 	if err := wait.PollImmediate(5*time.Second, time.Minute, func() (bool, error) {
 		podList, err = clientSet.CoreV1().Pods(rc.Namespace).List(ctx, metav1.ListOptions{LabelSelector: labels.SelectorFromSet(rc.Spec.Template.Labels).String()})
--- a/test/e2e/e2e_toomanyrestarts_test.go
+++ b/test/e2e/e2e_toomanyrestarts_test.go
@@ -37,7 +37,7 @@ import (
 func TestTooManyRestarts(t *testing.T) {
 	ctx := context.Background()

-	clientSet, _, stopCh := initializeClient(t)
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)

 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
@@ -157,6 +157,7 @@ func TestTooManyRestarts(t *testing.T) {
 				},
 				workerNodes,
 				podEvictor,
+				getPodsAssignedToNode,
 			)

 			waitForTerminatingPodsToDisappear(ctx, t, clientSet, testNamespace.Name)
--- a/test/e2e/e2e_topologyspreadconstraint_test.go
+++ b/test/e2e/e2e_topologyspreadconstraint_test.go
@@ -18,7 +18,7 @@ const zoneTopologyKey string = "topology.kubernetes.io/zone"

 func TestTopologySpreadConstraint(t *testing.T) {
 	ctx := context.Background()
-	clientSet, _, stopCh := initializeClient(t)
+	clientSet, _, getPodsAssignedToNode, stopCh := initializeClient(t)
 	defer close(stopCh)
 	nodeList, err := clientSet.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
 	if err != nil {
@@ -92,6 +92,7 @@ func TestTopologySpreadConstraint(t *testing.T) {
 				},
 				nodes,
 				podEvictor,
+				getPodsAssignedToNode,
 			)
 			t.Logf("Finished RemovePodsViolatingTopologySpreadConstraint strategy for %s", name)