diff --git a/tests/existing-resources/main.tf b/tests/existing-resources/main.tf
index 4578297c..c77f70fe 100644
--- a/tests/existing-resources/main.tf
+++ b/tests/existing-resources/main.tf
@@ -28,6 +28,22 @@ module "vpc" {
         public_gateway = true
         acl_name       = "vpc-acl"
       }
+    ],
+    zone-2 = [
+      {
+        name           = "subnet-b"
+        cidr           = "10.20.10.0/24"
+        public_gateway = false
+        acl_name       = "vpc-acl"
+      }
+    ],
+    zone-3 = [
+      {
+        name           = "subnet-c"
+        cidr           = "10.30.10.0/24"
+        public_gateway = false
+        acl_name       = "vpc-acl"
+      }
     ]
   }
 }