diff --git a/addons/api/mirage/models/managed-groups.js b/addons/api/mirage/models/managed-groups.js
index 7faa2b5a2..689991383 100644
--- a/addons/api/mirage/models/managed-groups.js
+++ b/addons/api/mirage/models/managed-groups.js
@@ -2,4 +2,5 @@ import { Model, belongsTo } from 'ember-cli-mirage';
 
 export default Model.extend({
   scope: belongsTo(),
+  authMethodId: belongsTo(),
 });