diff --git a/doc/configuration.md b/doc/configuration.md
index bcc5a91f8..5534f4ad4 100644
--- a/doc/configuration.md
+++ b/doc/configuration.md
@@ -53,7 +53,7 @@ User should chose following parameters combination (`clusterNetwork`+`defaultNet
 
 Multus will find network for clusterNetwork/defaultNetworks as following sequences:
 
-1. CRD object for given network name, in 'default' namespace
+1. CRD object for given network name, in 'kube-system' namespace
 1. CNI json config file in `confDir`. Given name should be without extention, like .conf/.conflist. (e.g. "test" for "test.conf")
 1. Directory for CNI json config file. Multus will find alphabetically first file for the network
 1. Multus failed to find network. Multus raise error message
diff --git a/k8sclient/k8sclient.go b/k8sclient/k8sclient.go
index d2dde5f7e..d599f7284 100644
--- a/k8sclient/k8sclient.go
+++ b/k8sclient/k8sclient.go
@@ -532,7 +532,7 @@ func GetPodNetwork(k8sclient KubeClient, k8sArgs *types.K8sArgs, confdir string)
 
 func getDefaultNetDelegateCRD(client KubeClient, net string, confdir string) (*types.DelegateNetConf, error) {
 	logging.Debugf("getDefaultNetDelegate: %v, %v, %s", client, net, confdir)
-	rawPath := fmt.Sprintf("/apis/k8s.cni.cncf.io/v1/namespaces/%s/network-attachment-definitions/%s", "default", net)
+	rawPath := fmt.Sprintf("/apis/k8s.cni.cncf.io/v1/namespaces/%s/network-attachment-definitions/%s", "kube-system", net)
 	netData, err := client.GetRawWithPath(rawPath)
 	if err != nil {
 		return nil, logging.Errorf("getDefaultNetDelegate: failed to get network resource, refer Multus README.md for the usage guide: %v", err)
diff --git a/k8sclient/k8sclient_test.go b/k8sclient/k8sclient_test.go
index 153eb9d9a..f6f4c9a13 100644
--- a/k8sclient/k8sclient_test.go
+++ b/k8sclient/k8sclient_test.go
@@ -294,8 +294,8 @@ var _ = Describe("k8sclient operations", func() {
 		}
 
 		fKubeClient := testutils.NewFakeKubeClient()
+		fKubeClient.AddNetConfig("kube-system", "myCRD1", "{\"type\": \"mynet\"}")
 		fKubeClient.AddPod(fakePod)
-		fKubeClient.AddNetConfig("default", "myCRD1", "{\"type\": \"mynet\"}")
 		kubeClient, err := GetK8sClient("", fKubeClient)
 		Expect(err).NotTo(HaveOccurred())
 		k8sArgs, err := GetK8sArgs(args)
@@ -325,9 +325,9 @@ var _ = Describe("k8sclient operations", func() {
 		}
 
 		fKubeClient := testutils.NewFakeKubeClient()
+		fKubeClient.AddNetConfig("kube-system", "myCRD1", "{\"type\": \"mynet\"}")
+		fKubeClient.AddNetConfig("kube-system", "myCRD2", "{\"type\": \"mynet2\"}")
 		fKubeClient.AddPod(fakePod)
-		fKubeClient.AddNetConfig("default", "myCRD1", "{\"type\": \"mynet\"}")
-		fKubeClient.AddNetConfig("default", "myCRD2", "{\"type\": \"mynet2\"}")
 		kubeClient, err := GetK8sClient("", fKubeClient)
 		Expect(err).NotTo(HaveOccurred())
 		k8sArgs, err := GetK8sArgs(args)
@@ -361,9 +361,9 @@ var _ = Describe("k8sclient operations", func() {
 		}
 
 		fKubeClient := testutils.NewFakeKubeClient()
+		fKubeClient.AddNetConfig("kube-system", "myCRD1", "{\"type\": \"mynet\"}")
+		fKubeClient.AddNetConfig("kube-system", "myCRD2", "{\"type\": \"mynet2\"}")
 		fKubeClient.AddPod(fakePod)
-		fKubeClient.AddNetConfig("default", "myCRD1", "{\"type\": \"mynet\"}")
-		fKubeClient.AddNetConfig("default", "myCRD2", "{\"type\": \"mynet2\"}")
 		kubeClient, err := GetK8sClient("", fKubeClient)
 		Expect(err).NotTo(HaveOccurred())
 		k8sArgs, err := GetK8sArgs(args)
@@ -428,13 +428,13 @@ var _ = Describe("k8sclient operations", func() {
 		}
 
 		fKubeClient := testutils.NewFakeKubeClient()
-		fKubeClient.AddPod(fakePod)
 		net1Name := filepath.Join(tmpDir, "10-net1.conf")
 		fKubeClient.AddNetFile(fakePod.ObjectMeta.Namespace, "10-net1", net1Name, `{
 	"name": "net1",
 	"type": "mynet",
 	"cniVersion": "0.2.0"
 }`)
+		fKubeClient.AddPod(fakePod)
 		kubeClient, err := GetK8sClient("", fKubeClient)
 		Expect(err).NotTo(HaveOccurred())
 		k8sArgs, err := GetK8sArgs(args)
@@ -490,9 +490,9 @@ var _ = Describe("k8sclient operations", func() {
 		}
 
 		fKubeClient := testutils.NewFakeKubeClient()
-		fKubeClient.AddPod(fakePod)
 		fKubeClient.AddNetConfig("default", "net1", "{\"type\": \"mynet1\"}")
-		fKubeClient.AddNetConfig("default", "net2", "{\"type\": \"mynet2\"}")
+		fKubeClient.AddNetConfig("kube-system", "net2", "{\"type\": \"mynet2\"}")
+		fKubeClient.AddPod(fakePod)
 		kubeClient, err := GetK8sClient("", fKubeClient)
 		Expect(err).NotTo(HaveOccurred())
 		k8sArgs, err := GetK8sArgs(args)