diff --git a/cluster/kubemark/gce/config-default.sh b/cluster/kubemark/gce/config-default.sh
index e794b451ba9..20a4b0a26b9 100644
--- a/cluster/kubemark/gce/config-default.sh
+++ b/cluster/kubemark/gce/config-default.sh
@@ -80,15 +80,18 @@ if [ -n "${STORAGE_MEDIA_TYPE:-}" ]; then
 fi
 
 ENABLE_GARBAGE_COLLECTOR=${ENABLE_GARBAGE_COLLECTOR:-true}
-USE_REAL_PROXIER=${USE_REAL_PROXIER:-true}  # for hollow-proxy
 
 CUSTOM_ADMISSION_PLUGINS="${CUSTOM_ADMISSION_PLUGINS:-Initializers,NamespaceLifecycle,LimitRanger,ServiceAccount,PodPreset,DefaultTolerationSeconds,NodeRestriction,ResourceQuota}"
 
+# Master components' test arguments.
+APISERVER_TEST_ARGS="${KUBEMARK_APISERVER_TEST_ARGS:-} --runtime-config=extensions/v1beta1 ${API_SERVER_TEST_LOG_LEVEL} ${TEST_CLUSTER_STORAGE_MEDIA_TYPE} ${TEST_CLUSTER_MAX_REQUESTS_INFLIGHT} ${TEST_CLUSTER_DELETE_COLLECTION_WORKERS} --enable-garbage-collector=${ENABLE_GARBAGE_COLLECTOR}"
+CONTROLLER_MANAGER_TEST_ARGS="${KUBEMARK_CONTROLLER_MANAGER_TEST_ARGS:-} ${CONTROLLER_MANAGER_TEST_LOG_LEVEL} ${TEST_CLUSTER_RESYNC_PERIOD} ${TEST_CLUSTER_API_CONTENT_TYPE} ${KUBEMARK_MASTER_COMPONENTS_QPS_LIMITS} --enable-garbage-collector=${ENABLE_GARBAGE_COLLECTOR}"
+SCHEDULER_TEST_ARGS="${KUBEMARK_SCHEDULER_TEST_ARGS:-} ${SCHEDULER_TEST_LOG_LEVEL} ${TEST_CLUSTER_API_CONTENT_TYPE} ${KUBEMARK_MASTER_COMPONENTS_QPS_LIMITS}"
+
+# Hollow-node components' test arguments.
 KUBELET_TEST_ARGS="--max-pods=100 $TEST_CLUSTER_LOG_LEVEL ${TEST_CLUSTER_API_CONTENT_TYPE}"
-APISERVER_TEST_ARGS="--runtime-config=extensions/v1beta1 ${API_SERVER_TEST_LOG_LEVEL} ${TEST_CLUSTER_STORAGE_MEDIA_TYPE} ${TEST_CLUSTER_MAX_REQUESTS_INFLIGHT} ${TEST_CLUSTER_DELETE_COLLECTION_WORKERS} --enable-garbage-collector=${ENABLE_GARBAGE_COLLECTOR}"
-CONTROLLER_MANAGER_TEST_ARGS="${CONTROLLER_MANAGER_TEST_LOG_LEVEL} ${TEST_CLUSTER_RESYNC_PERIOD} ${TEST_CLUSTER_API_CONTENT_TYPE} ${KUBEMARK_MASTER_COMPONENTS_QPS_LIMITS} --enable-garbage-collector=${ENABLE_GARBAGE_COLLECTOR}"
-SCHEDULER_TEST_ARGS="${SCHEDULER_TEST_LOG_LEVEL} ${TEST_CLUSTER_API_CONTENT_TYPE} ${KUBEMARK_MASTER_COMPONENTS_QPS_LIMITS}"
 KUBEPROXY_TEST_ARGS="${KUBEPROXY_TEST_LOG_LEVEL} ${TEST_CLUSTER_API_CONTENT_TYPE}"
+USE_REAL_PROXIER=${USE_REAL_PROXIER:-true}  # for hollow-proxy
 
 SERVICE_CLUSTER_IP_RANGE="10.0.0.0/16"  # formerly PORTAL_NET
 ALLOCATE_NODE_CIDRS=true