diff --git a/npm/pkg/dataplane/dataplane_linux_test.go b/npm/pkg/dataplane/dataplane_linux_test.go
index e7ad11733c..9f9363ba4f 100644
--- a/npm/pkg/dataplane/dataplane_linux_test.go
+++ b/npm/pkg/dataplane/dataplane_linux_test.go
@@ -11,6 +11,7 @@ import (
 	"github.com/Azure/azure-container-networking/npm/util"
 	testutils "github.com/Azure/azure-container-networking/test/utils"
 	"github.com/stretchr/testify/require"
+	"k8s.io/klog"
 )
 
 var netpolInBackgroundCfg = &Config{
@@ -81,7 +82,8 @@ func TestNetPolInBackgroundUpdatePolicy(t *testing.T) {
 	require.NoError(t, err)
 	defer func() {
 		stopCh <- struct{}{}
-		time.Sleep(100 * time.Millisecond)
+		time.Sleep(1000 * time.Millisecond)
+		klog.Info("defer for TestNetPolInBackgroundUpdatePolicy finished")
 	}()
 
 	dp.RunPeriodicTasks()
@@ -89,12 +91,12 @@ func TestNetPolInBackgroundUpdatePolicy(t *testing.T) {
 	err = dp.AddPolicy(&testPolicyobj)
 	require.NoError(t, err)
 
-	time.Sleep(500 * time.Millisecond)
+	time.Sleep(1000 * time.Millisecond)
 
 	err = dp.UpdatePolicy(&updatedTestPolicyobj)
 	require.NoError(t, err)
 
-	time.Sleep(100 * time.Millisecond)
+	time.Sleep(1000 * time.Millisecond)
 
 	linuxPromVals{2, 1, 0, 0, 1}.assert(t)
 }
@@ -110,14 +112,15 @@ func TestNetPolInBackgroundSkipAddAfterRemove(t *testing.T) {
 	require.NoError(t, err)
 	defer func() {
 		stopCh <- struct{}{}
-		time.Sleep(500 * time.Millisecond)
+		time.Sleep(1000 * time.Millisecond)
+		klog.Info("defer for TestNetPolInBackgroundSkipAddAfterRemove finished")
 	}()
 
 	require.NoError(t, dp.AddPolicy(&testPolicyobj))
 	require.NoError(t, dp.RemovePolicy(testPolicyobj.PolicyKey))
 
 	dp.RunPeriodicTasks()
-	time.Sleep(100 * time.Millisecond)
+	time.Sleep(1000 * time.Millisecond)
 
 	// nothing happens
 	linuxPromVals{0, 0, 0, 0, 0}.assert(t)
@@ -175,7 +178,7 @@ func TestNetPolInBackgroundFailureToAddFirstTime(t *testing.T) {
 	require.NoError(t, err)
 	defer func() {
 		stopCh <- struct{}{}
-		time.Sleep(500 * time.Millisecond)
+		time.Sleep(1000 * time.Millisecond)
 	}()
 
 	require.NoError(t, dp.AddPolicy(&testPolicyobj))