diff --git a/pkg/scheduler/ugm/manager_test.go b/pkg/scheduler/ugm/manager_test.go
index 210e960a2..310295771 100644
--- a/pkg/scheduler/ugm/manager_test.go
+++ b/pkg/scheduler/ugm/manager_test.go
@@ -695,6 +695,7 @@ func TestDecreaseTrackedResourceForGroupTracker(t *testing.T) {
 	setupUGM()
 	// Queue setup:
 	// root->parent
+	// case 1: DecreaseTrackedResource with specified config limits
 	user := security.UserGroup{User: "user1", Groups: []string{"group1"}}
 	conf := createConfigWithoutLimits()
 	conf.Queues[0].Queues[0].Limits = []configs.Limit{
@@ -720,21 +721,20 @@ func TestDecreaseTrackedResourceForGroupTracker(t *testing.T) {
 	assert.Equal(t, resources.Equals(groupTracker.queueTracker.childQueueTrackers["parent"].resourceUsage, usage), true)
 
 	manager.DecreaseTrackedResource("root.parent", TestApp1, usage, user, true)
-
 	groupTracker = m.GetGroupTracker(user.Groups[0])
 	assert.Equal(t, groupTracker != nil, true)
 	assert.Equal(t, groupTracker.queueTracker.childQueueTrackers["parent"].runningApplications[TestApp1], false)
 	assert.Equal(t, resources.Equals(groupTracker.queueTracker.childQueueTrackers["parent"].resourceUsage, resources.Zero), true)
 
+	// case 2: DecreaseTrackedResource with nil config limits
+	conf.Queues[0].Queues[0].Limits = nil
+	assert.NilError(t, manager.UpdateConfig(conf.Queues[0], "root"))
 	manager.IncreaseTrackedResource("root.parent", TestApp1, usage, user)
 	groupTracker = m.GetGroupTracker(user.Groups[0])
 	assert.Equal(t, groupTracker != nil, true)
 	assert.Equal(t, groupTracker.queueTracker.childQueueTrackers["parent"].runningApplications[TestApp1], true)
 	assert.Equal(t, resources.Equals(groupTracker.queueTracker.childQueueTrackers["parent"].resourceUsage, usage), true)
 
-	conf.Queues[0].Queues[0].Limits = nil
-	assert.NilError(t, manager.UpdateConfig(conf.Queues[0], "root"))
-
 	manager.DecreaseTrackedResource("root.parent", TestApp1, usage, user, true)
 	groupTracker = m.GetGroupTracker(user.Groups[0])
 	assert.Equal(t, groupTracker == nil, true)