diff --git a/example/custom-plugin/go.mod b/example/custom-plugin/go.mod
index 07899c3f84e..cb2d7aa2f04 100644
--- a/example/custom-plugin/go.mod
+++ b/example/custom-plugin/go.mod
@@ -3,32 +3,32 @@ module custom-plugin
 go 1.14
 
 replace (
-        github.com/volcano-sh/volcano => volcano.sh/volcano v1.1.0
-        k8s.io/api => k8s.io/api v0.18.3
-        k8s.io/apiextensions-apiserver => k8s.io/apiextensions-apiserver v0.18.3
-        k8s.io/apimachinery => k8s.io/apimachinery v0.18.3
-        k8s.io/apiserver => k8s.io/apiserver v0.18.3
-        k8s.io/cli-runtime => k8s.io/cli-runtime v0.18.3
-        k8s.io/client-go => k8s.io/client-go v0.18.3
-        k8s.io/cloud-provider => k8s.io/cloud-provider v0.18.3
-        k8s.io/cluster-bootstrap => k8s.io/cluster-bootstrap v0.18.3
-        k8s.io/code-generator => k8s.io/code-generator v0.18.3
-        k8s.io/component-base => k8s.io/component-base v0.18.3
-        k8s.io/cri-api => k8s.io/cri-api v0.18.3
-        k8s.io/csi-translation-lib => k8s.io/csi-translation-lib v0.18.3
-        k8s.io/klog => k8s.io/klog v1.0.0
-        k8s.io/kube-aggregator => k8s.io/kube-aggregator v0.18.3
-        k8s.io/kube-controller-manager => k8s.io/kube-controller-manager v0.18.3
-        k8s.io/kube-proxy => k8s.io/kube-proxy v0.18.3
-        k8s.io/kube-scheduler => k8s.io/kube-scheduler v0.18.3
-        k8s.io/kubectl => k8s.io/kubectl v0.18.3
-        k8s.io/kubelet => k8s.io/kubelet v0.18.3
-        k8s.io/legacy-cloud-providers => k8s.io/legacy-cloud-providers v0.18.3
-        k8s.io/metrics => k8s.io/metrics v0.18.3
-        k8s.io/node-api => k8s.io/node-api v0.18.3
-        k8s.io/sample-apiserver => k8s.io/sample-apiserver v0.18.3
-        k8s.io/sample-cli-plugin => k8s.io/sample-cli-plugin v0.18.3
-        k8s.io/sample-controller => k8s.io/sample-controller v0.18.3
+	github.com/volcano-sh/volcano => volcano.sh/volcano v1.1.0
+	k8s.io/api => k8s.io/api v0.18.3
+	k8s.io/apiextensions-apiserver => k8s.io/apiextensions-apiserver v0.18.3
+	k8s.io/apimachinery => k8s.io/apimachinery v0.18.3
+	k8s.io/apiserver => k8s.io/apiserver v0.18.3
+	k8s.io/cli-runtime => k8s.io/cli-runtime v0.18.3
+	k8s.io/client-go => k8s.io/client-go v0.18.3
+	k8s.io/cloud-provider => k8s.io/cloud-provider v0.18.3
+	k8s.io/cluster-bootstrap => k8s.io/cluster-bootstrap v0.18.3
+	k8s.io/code-generator => k8s.io/code-generator v0.18.3
+	k8s.io/component-base => k8s.io/component-base v0.18.3
+	k8s.io/cri-api => k8s.io/cri-api v0.18.3
+	k8s.io/csi-translation-lib => k8s.io/csi-translation-lib v0.18.3
+	k8s.io/klog => k8s.io/klog v1.0.0
+	k8s.io/kube-aggregator => k8s.io/kube-aggregator v0.18.3
+	k8s.io/kube-controller-manager => k8s.io/kube-controller-manager v0.18.3
+	k8s.io/kube-proxy => k8s.io/kube-proxy v0.18.3
+	k8s.io/kube-scheduler => k8s.io/kube-scheduler v0.18.3
+	k8s.io/kubectl => k8s.io/kubectl v0.18.3
+	k8s.io/kubelet => k8s.io/kubelet v0.18.3
+	k8s.io/legacy-cloud-providers => k8s.io/legacy-cloud-providers v0.18.3
+	k8s.io/metrics => k8s.io/metrics v0.18.3
+	k8s.io/node-api => k8s.io/node-api v0.18.3
+	k8s.io/sample-apiserver => k8s.io/sample-apiserver v0.18.3
+	k8s.io/sample-cli-plugin => k8s.io/sample-cli-plugin v0.18.3
+	k8s.io/sample-controller => k8s.io/sample-controller v0.18.3
 )
 
-require volcano.sh/volcano v1.1.0
\ No newline at end of file
+require volcano.sh/volcano v1.1.0
diff --git a/installer/helm/chart/volcano/config/volcano-scheduler-ci.conf b/installer/helm/chart/volcano/config/volcano-scheduler-ci.conf
index 31f8f1a6872..a826b4dedc0 100644
--- a/installer/helm/chart/volcano/config/volcano-scheduler-ci.conf
+++ b/installer/helm/chart/volcano/config/volcano-scheduler-ci.conf
@@ -5,6 +5,7 @@ tiers:
   - name: gang
   - name: conformance
 - plugins:
+  - name: overcommit
   - name: drf
   - name: predicates
   - name: proportion
diff --git a/pkg/scheduler/actions/enqueue/enqueue.go b/pkg/scheduler/actions/enqueue/enqueue.go
index a09daf5903e..23e7fd55f75 100644
--- a/pkg/scheduler/actions/enqueue/enqueue.go
+++ b/pkg/scheduler/actions/enqueue/enqueue.go
@@ -91,7 +91,7 @@ func (enqueue *Action) Execute(ssn *framework.Session) {
 		}
 		job := jobs.Pop().(*api.JobInfo)
 
-		if job.PodGroup.Spec.MinResources == nil || ssn.JobEnqueueReject(job){
+		if job.PodGroup.Spec.MinResources == nil || ssn.JobEnqueueReject(job) {
 			job.PodGroup.Status.Phase = scheduling.PodGroupInqueue
 			ssn.Jobs[job.UID] = job
 		}
@@ -102,4 +102,3 @@ func (enqueue *Action) Execute(ssn *framework.Session) {
 }
 
 func (enqueue *Action) UnInitialize() {}
-
diff --git a/pkg/scheduler/actions/enqueue/enqueue_test.go b/pkg/scheduler/actions/enqueue/enqueue_test.go
deleted file mode 100644
index eb267bb85e5..00000000000
--- a/pkg/scheduler/actions/enqueue/enqueue_test.go
+++ /dev/null
@@ -1,3 +0,0 @@
-package enqueue
-
-
diff --git a/pkg/scheduler/framework/session.go b/pkg/scheduler/framework/session.go
index af0b7a58d0c..9f5f72e459b 100644
--- a/pkg/scheduler/framework/session.go
+++ b/pkg/scheduler/framework/session.go
@@ -42,15 +42,15 @@ type Session struct {
 
 	// podGroupStatus cache podgroup status during schedule
 	// This should not be mutated after initiated
-	podGroupStatus      map[api.JobID]scheduling.PodGroupStatus
+	podGroupStatus map[api.JobID]scheduling.PodGroupStatus
 
-	Jobs                map[api.JobID]*api.JobInfo
-	Nodes               map[string]*api.NodeInfo
-	Queues              map[api.QueueID]*api.QueueInfo
-	NamespaceInfo       map[api.NamespaceName]*api.NamespaceInfo
+	Jobs          map[api.JobID]*api.JobInfo
+	Nodes         map[string]*api.NodeInfo
+	Queues        map[api.QueueID]*api.QueueInfo
+	NamespaceInfo map[api.NamespaceName]*api.NamespaceInfo
 
-	Tiers               []conf.Tier
-	Configurations      []conf.Configuration
+	Tiers          []conf.Tier
+	Configurations []conf.Configuration
 
 	plugins             map[string]Plugin
 	eventHandlers       []*EventHandler
@@ -79,15 +79,15 @@ type Session struct {
 
 func openSession(cache cache.Cache) *Session {
 	ssn := &Session{
-		UID:                 uuid.NewUUID(),
-		kubeClient:          cache.Client(),
-		cache:               cache,
+		UID:        uuid.NewUUID(),
+		kubeClient: cache.Client(),
+		cache:      cache,
 
-		podGroupStatus:      map[api.JobID]scheduling.PodGroupStatus{},
+		podGroupStatus: map[api.JobID]scheduling.PodGroupStatus{},
 
-		Jobs:                map[api.JobID]*api.JobInfo{},
-		Nodes:               map[string]*api.NodeInfo{},
-		Queues:              map[api.QueueID]*api.QueueInfo{},
+		Jobs:   map[api.JobID]*api.JobInfo{},
+		Nodes:  map[string]*api.NodeInfo{},
+		Queues: map[api.QueueID]*api.QueueInfo{},
 
 		plugins:             map[string]Plugin{},
 		jobOrderFns:         map[string]api.CompareFn{},
diff --git a/pkg/scheduler/plugins/overcommit/overcommit.go b/pkg/scheduler/plugins/overcommit/overcommit.go
index 9b2c5231d75..44cdf1dfa29 100644
--- a/pkg/scheduler/plugins/overcommit/overcommit.go
+++ b/pkg/scheduler/plugins/overcommit/overcommit.go
@@ -43,6 +43,7 @@ type overcommitPlugin struct {
 	overCommitFactor float64
 }
 
+// New function returns overcommit plugin object
 func New(arguments framework.Arguments) framework.Plugin {
 	return &overcommitPlugin{
 		pluginArguments:  arguments,
@@ -88,6 +89,7 @@ func (op *overcommitPlugin) OnSessionOpen(ssn *framework.Session) {
 			klog.V(4).Infof("job <%s/%s> is bestEffort, allow it be inqueue", job.Namespace, job.Name)
 			return true
 		}
+		//TODO: allow 1 more job be inqueue beyond overcommit-factor, may cause large job inqueue and creating pods
 		if inqueue.LessEqual(idle) {
 			klog.V(4).Infof("sufficient resources, allow job <%s/%s> be inqueue", job.Namespace, job.Name)
 			op.inqueueResource.Add(api.NewResource(*job.PodGroup.Spec.MinResources))
@@ -102,4 +104,4 @@ func (op *overcommitPlugin) OnSessionOpen(ssn *framework.Session) {
 func (op *overcommitPlugin) OnSessionClose(ssn *framework.Session) {
 	op.idleResource = nil
 	op.inqueueResource = nil
-}
\ No newline at end of file
+}
diff --git a/pkg/scheduler/util_test.go b/pkg/scheduler/util_test.go
index 79ea5af58c0..8e6477a290c 100644
--- a/pkg/scheduler/util_test.go
+++ b/pkg/scheduler/util_test.go
@@ -27,10 +27,6 @@ import (
 func TestLoadSchedulerConf(t *testing.T) {
 	configuration := `
 actions: "enqueue, allocate, backfill"
-configurations:
-- name: enqueue
-  arguments:
-    "overcommit-factor": 1.5
 tiers:
 - plugins:
   - name: priority
@@ -53,6 +49,7 @@ tiers:
 					EnabledNamespaceOrder: &trueValue,
 					EnabledJobReady:       &trueValue,
 					EnabledJobPipelined:   &trueValue,
+					EnabledJobEnqueued:    &trueValue,
 					EnabledTaskOrder:      &trueValue,
 					EnabledPreemptable:    &trueValue,
 					EnabledReclaimable:    &trueValue,
@@ -71,6 +68,7 @@ tiers:
 					EnabledNamespaceOrder: &trueValue,
 					EnabledJobReady:       &trueValue,
 					EnabledJobPipelined:   &trueValue,
+					EnabledJobEnqueued:    &trueValue,
 					EnabledTaskOrder:      &trueValue,
 					EnabledPreemptable:    &trueValue,
 					EnabledReclaimable:    &trueValue,
@@ -89,6 +87,7 @@ tiers:
 					EnabledNamespaceOrder: &trueValue,
 					EnabledJobReady:       &trueValue,
 					EnabledJobPipelined:   &trueValue,
+					EnabledJobEnqueued:    &trueValue,
 					EnabledTaskOrder:      &trueValue,
 					EnabledPreemptable:    &trueValue,
 					EnabledReclaimable:    &trueValue,
@@ -111,6 +110,7 @@ tiers:
 					EnabledNamespaceOrder: &trueValue,
 					EnabledJobReady:       &trueValue,
 					EnabledJobPipelined:   &trueValue,
+					EnabledJobEnqueued:    &trueValue,
 					EnabledTaskOrder:      &trueValue,
 					EnabledPreemptable:    &trueValue,
 					EnabledReclaimable:    &trueValue,
@@ -129,6 +129,7 @@ tiers:
 					EnabledNamespaceOrder: &trueValue,
 					EnabledJobReady:       &trueValue,
 					EnabledJobPipelined:   &trueValue,
+					EnabledJobEnqueued:    &trueValue,
 					EnabledTaskOrder:      &trueValue,
 					EnabledPreemptable:    &trueValue,
 					EnabledReclaimable:    &trueValue,
@@ -147,6 +148,7 @@ tiers:
 					EnabledNamespaceOrder: &trueValue,
 					EnabledJobReady:       &trueValue,
 					EnabledJobPipelined:   &trueValue,
+					EnabledJobEnqueued:    &trueValue,
 					EnabledTaskOrder:      &trueValue,
 					EnabledPreemptable:    &trueValue,
 					EnabledReclaimable:    &trueValue,
@@ -165,6 +167,7 @@ tiers:
 					EnabledNamespaceOrder: &trueValue,
 					EnabledJobReady:       &trueValue,
 					EnabledJobPipelined:   &trueValue,
+					EnabledJobEnqueued:    &trueValue,
 					EnabledTaskOrder:      &trueValue,
 					EnabledPreemptable:    &trueValue,
 					EnabledReclaimable:    &trueValue,
@@ -181,14 +184,7 @@ tiers:
 		},
 	}
 
-	expectedConfigurations := []conf.Configuration{
-		{
-			Name: "enqueue",
-			Arguments: map[string]string{
-				"overcommit-factor": "1.5",
-			},
-		},
-	}
+	var expectedConfigurations []conf.Configuration
 
 	_, tiers, configurations, err := unmarshalSchedulerConf(configuration)
 	if err != nil {