diff --git a/cluster/gce/config-test.sh b/cluster/gce/config-test.sh
index 7b6bf1b746a..284abadf8aa 100755
--- a/cluster/gce/config-test.sh
+++ b/cluster/gce/config-test.sh
@@ -99,6 +99,7 @@ SCHEDULER_TEST_LOG_LEVEL="${SCHEDULER_TEST_LOG_LEVEL:-$TEST_CLUSTER_LOG_LEVEL}"
 KUBEPROXY_TEST_LOG_LEVEL="${KUBEPROXY_TEST_LOG_LEVEL:-$TEST_CLUSTER_LOG_LEVEL}"
 
 TEST_CLUSTER_DELETE_COLLECTION_WORKERS="${TEST_CLUSTER_DELETE_COLLECTION_WORKERS:---delete-collection-workers=1}"
+TEST_CLUSTER_MAX_REQUESTS_INFLIGHT="${TEST_CLUSTER_MAX_REQUESTS_INFLIGHT:-}"
 TEST_CLUSTER_RESYNC_PERIOD="${TEST_CLUSTER_RESYNC_PERIOD:---min-resync-period=3m}"
 
 # ContentType used by all components to communicate with apiserver.
@@ -107,7 +108,7 @@ TEST_CLUSTER_API_CONTENT_TYPE="${TEST_CLUSTER_API_CONTENT_TYPE:-}"
 TEST_CLUSTER_STORAGE_CONTENT_TYPE="${TEST_CLUSTER_STORAGE_CONTENT_TYPE:-}"
 
 KUBELET_TEST_ARGS="--max-pods=110 --serialize-image-pulls=false --outofdisk-transition-frequency=0 ${TEST_CLUSTER_API_CONTENT_TYPE}"
-APISERVER_TEST_ARGS="--runtime-config=extensions/v1beta1 ${TEST_CLUSTER_DELETE_COLLECTION_WORKERS} ${TEST_CLUSTER_STORAGE_CONTENT_TYPE}"
+APISERVER_TEST_ARGS="--runtime-config=extensions/v1beta1 ${TEST_CLUSTER_DELETE_COLLECTION_WORKERS} ${TEST_CLUSTER_MAX_REQUESTS_INFLIGHT} ${TEST_CLUSTER_STORAGE_CONTENT_TYPE}"
 CONTROLLER_MANAGER_TEST_ARGS="${TEST_CLUSTER_RESYNC_PERIOD} ${TEST_CLUSTER_API_CONTENT_TYPE}"
 SCHEDULER_TEST_ARGS="${TEST_CLUSTER_API_CONTENT_TYPE}"
 KUBEPROXY_TEST_ARGS="${TEST_CLUSTER_API_CONTENT_TYPE}"