diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d326aecbd..8546bfa6e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -325,7 +325,7 @@ before_script:
   KUBE_NETWORK_PLUGIN: weave
   CLOUD_IMAGE: coreos-alpha
   CLOUD_REGION: us-west1-a
-  CLUSTER_MODE: ha
+  CLUSTER_MODE: ha-scale
   BOOTSTRAP_OS: coreos
 
 .ubuntu_rkt_sep_variables: &ubuntu_rkt_sep_variables
diff --git a/docs/test_cases.md b/docs/test_cases.md
index 5e232b63a..8cb282395 100644
--- a/docs/test_cases.md
+++ b/docs/test_cases.md
@@ -57,13 +57,13 @@ GCE instances
 |--------------------|--------------------|--------------------|--------------------|--------------------|
 |               part1|              calico|       coreos-stable|          us-west1-b|            separate|
 |               part1|               canal|  debian-8-kubespray|          us-east1-b|                  ha|
-|               part1|               weave|              rhel-7|      europe-west1-b|               scale|
+|               part1|               weave|              rhel-7|      europe-west1-b|             default|
 |               part2|             flannel|            centos-7|          us-west1-a|             default|
 |               part2|              calico|  debian-8-kubespray|       us-central1-b|             default|
 |               part2|               canal|       coreos-stable|          us-east1-b|             default|
 |             special|               canal|              rhel-7|          us-east1-b|            separate|
-|             special|               weave|  ubuntu-1604-xenial|       us-central1-b|               scale|
+|             special|               weave|  ubuntu-1604-xenial|       us-central1-b|             default|
 |             special|              calico|            centos-7|      europe-west1-b|            ha-scale|
-|             special|               weave|        coreos-alpha|          us-west1-a|                  ha|
+|             special|               weave|        coreos-alpha|          us-west1-a|            ha-scale|
 
 The "Stage" means a build step of the build pipeline. The steps are ordered as `part1->part2->special`.
diff --git a/tests/testcases/040_check-network-adv.yml b/tests/testcases/040_check-network-adv.yml
index 90a5eba7b..21d265bf5 100644
--- a/tests/testcases/040_check-network-adv.yml
+++ b/tests/testcases/040_check-network-adv.yml
@@ -42,7 +42,7 @@
     - name: Get netchecker agents
       uri: url=http://localhost:{{netchecker_port}}/api/v1/agents/ return_content=yes
       run_once: true
-      delegate_to: "{{groups['kube-node'][0]}}"
+      delegate_to: "{{groups['kube-master'][0]}}"
       register: agents
       retries: 6
       delay: "{{ agent_report_interval }}"
@@ -54,12 +54,11 @@
 
     - debug: var=agents.content|from_json
       failed_when: not agents|success and not agents.content=='{}'
-      delegate_to: "{{groups['kube-node'][0]}}"
       run_once: true
-
+      
     - name: Check netchecker status
       uri: url=http://localhost:{{netchecker_port}}/api/v1/connectivity_check status_code=200 return_content=yes
-      delegate_to: "{{groups['kube-node'][0]}}"
+      delegate_to: "{{groups['kube-master'][0]}}"
       run_once: true
       register: result
       retries: 3
@@ -70,7 +69,6 @@
 
     - debug: var=result.content|from_json
       failed_when: not result|success
-      delegate_to: "{{groups['kube-node'][0]}}"
       run_once: true
       when: not agents.content=='{}'