diff --git a/pkg/cmd/server/apis/config/v1/testdata/master-config.yaml b/pkg/cmd/server/apis/config/v1/testdata/master-config.yaml
index 3af21f52669c..3640bcfc8568 100644
--- a/pkg/cmd/server/apis/config/v1/testdata/master-config.yaml
+++ b/pkg/cmd/server/apis/config/v1/testdata/master-config.yaml
@@ -132,7 +132,9 @@ masterClients:
   openshiftLoopbackKubeConfig: ""
 masterPublicURL: ""
 networkConfig:
-  clusterNetworks: null
+  clusterNetworks:
+  - cidr: ""
+    hostSubnetLength: 0
   externalIPNetworkCIDRs: null
   ingressIPNetworkCIDR: 172.29.0.0/16
   networkPluginName: ""