diff --git a/tests/json.test.js b/tests/json.test.js
index 24fd6da672..e3d79e801e 100644
--- a/tests/json.test.js
+++ b/tests/json.test.js
@@ -30,7 +30,7 @@ const optionalRedirectConfigFields = {
     redirect_paths: "boolean"
 };
 
-const blockedFields = ["domain", "internal", "proxy", "reserved", "services", "subdomain", "nested", "record"];
+const blockedFields = ["domain", "internal", "proxy", "reserved", "services", "subdomain", "subdomains", "nested", "record"];
 
 const emailRegex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
 const hostnameRegex = /^(?=.{1,253}$)(?:(?:[_a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)\.)+[a-zA-Z]{2,63}$/;