diff --git a/src/azure-cli/azure/cli/command_modules/acs/tests/latest/test_aks_commands.py b/src/azure-cli/azure/cli/command_modules/acs/tests/latest/test_aks_commands.py
index 108a551d5d1..aba0608ae45 100644
--- a/src/azure-cli/azure/cli/command_modules/acs/tests/latest/test_aks_commands.py
+++ b/src/azure-cli/azure/cli/command_modules/acs/tests/latest/test_aks_commands.py
@@ -562,8 +562,8 @@ def test_aks_create_and_update_with_http_proxy_config(self, resource_group, reso
             --resource-group={resource_group} \
             --vnet-name={name} \
             --name proxy-subnet \
-            --address-prefix 10.42.3.0/24 \
-            --default-outbound false'
+            --address-prefix 10.42.3.0/24'
+            # --default-outbound false  # disable outbound connection would fail cluster creation
 
         show_subnet_cmd = 'network vnet subnet show \
             --resource-group={resource_group} \