diff --git a/core/server/services/api-version-compatibility/index.js b/core/server/services/api-version-compatibility/index.js
index a2ec8e27c8..79305e3cd4 100644
--- a/core/server/services/api-version-compatibility/index.js
+++ b/core/server/services/api-version-compatibility/index.js
@@ -13,6 +13,7 @@ const init = () => {
 
     this.APIVersionCompatibilityServiceInstance = new APIVersionCompatibilityService({
         sendEmail: (options) => {
+            // NOTE: not using bind here because mockMailer is having trouble mocking bound methods
             return ghostMailer.send(options);
         },
         fetchEmailsToNotify: versionNotificationsDataService.getNotificationEmails.bind(versionNotificationsDataService),