diff --git a/pkg/scheduler/core/extender.go b/pkg/scheduler/core/extender.go
index 14bd455cc03..f0071ececed 100644
--- a/pkg/scheduler/core/extender.go
+++ b/pkg/scheduler/core/extender.go
@@ -184,18 +184,19 @@ func (h *HTTPExtender) restorePodFromNodeInfo(
 	metaPod *schedulerapi.MetaPod,
 	nodeName string,
 	nodeNameToInfo map[string]*schedulercache.NodeInfo) (*v1.Pod, error) {
+	var nodeInfo *schedulercache.NodeInfo
 	if nodeInfo, ok := nodeNameToInfo[nodeName]; ok {
 		for _, pod := range nodeInfo.Pods() {
 			if string(pod.UID) == metaPod.UID {
 				return pod, nil
 			}
 		}
-		return nil, fmt.Errorf("extender: %v claims to preempt pod (UID: %v) on node: %v, but the pod is not found on that node.",
+		return nil, fmt.Errorf("extender: %v claims to preempt pod (UID: %v) on node: %v, but the pod is not found on that node",
 			h.extenderURL, metaPod, nodeInfo.Node().Name)
-	} else {
-		return nil, fmt.Errorf("extender: %v claims to preempt on node: %v but the node is not found in nodeNameToInfo map",
-			h.extenderURL, nodeInfo.Node().Name)
 	}
+
+	return nil, fmt.Errorf("extender: %v claims to preempt on node: %v but the node is not found in nodeNameToInfo map",
+		h.extenderURL, nodeInfo.Node().Name)
 }
 
 // convertToNodeNameToMetaVictims converts from struct type to meta types.
diff --git a/pkg/scheduler/core/generic_scheduler.go b/pkg/scheduler/core/generic_scheduler.go
index 6f3a9a323c1..f86ce887ef2 100644
--- a/pkg/scheduler/core/generic_scheduler.go
+++ b/pkg/scheduler/core/generic_scheduler.go
@@ -54,6 +54,7 @@ type FitError struct {
 	FailedPredicates FailedPredicateMap
 }
 
+// ErrNoNodesAvailable is used to describe the error that no nodes available to schedule pods.
 var ErrNoNodesAvailable = fmt.Errorf("no nodes available to schedule pods")
 
 const (
@@ -253,11 +254,11 @@ func (g *genericScheduler) Preempt(pod *v1.Pod, nodeLister algorithm.NodeLister,
 	nominatedPods := g.getLowerPriorityNominatedPods(pod, candidateNode.Name)
 	if nodeInfo, ok := g.cachedNodeInfoMap[candidateNode.Name]; ok {
 		return nodeInfo.Node(), nodeToVictims[candidateNode].Pods, nominatedPods, err
-	} else {
-		return nil, nil, nil, fmt.Errorf(
-			"preemption failed: the target node %s has been deleted from scheduler cache",
-			candidateNode.Name)
 	}
+
+	return nil, nil, nil, fmt.Errorf(
+		"preemption failed: the target node %s has been deleted from scheduler cache",
+		candidateNode.Name)
 }
 
 // processPreemptionWithExtenders processes preemption with extenders
diff --git a/pkg/scheduler/core/generic_scheduler_test.go b/pkg/scheduler/core/generic_scheduler_test.go
index eaca9831f75..ffb08932280 100644
--- a/pkg/scheduler/core/generic_scheduler_test.go
+++ b/pkg/scheduler/core/generic_scheduler_test.go
@@ -883,7 +883,7 @@ func TestSelectNodesForPreemption(t *testing.T) {
 	for _, test := range tests {
 		nodes := []*v1.Node{}
 		for _, n := range test.nodes {
-			node := makeNode(n, priorityutil.DefaultMilliCPURequest*5, priorityutil.DefaultMemoryRequest*5)
+			node := makeNode(n, 1000*5, priorityutil.DefaultMemoryRequest*5)
 			node.ObjectMeta.Labels = map[string]string{"hostname": node.Name}
 			nodes = append(nodes, node)
 		}
@@ -1286,7 +1286,7 @@ func TestPreempt(t *testing.T) {
 		}
 		cachedNodeInfoMap := map[string]*schedulercache.NodeInfo{}
 		for _, name := range nodeNames {
-			node := makeNode(name, priorityutil.DefaultMilliCpuRequest*5, priorityutil.DefaultMemoryRequest*5)
+			node := makeNode(name, 1000*5, priorityutil.DefaultMemoryRequest*5)
 			cache.AddNode(node)
 
 			// Set nodeInfo to extenders to mock extenders' cache for preemption.