diff --git a/types/tests/register.ts b/types/tests/register.ts
index 3e293fcbd..7256ef8b3 100644
--- a/types/tests/register.ts
+++ b/types/tests/register.ts
@@ -22,6 +22,7 @@ import {
   Filler,
   Legend,
   Title,
+  SubTitle,
   Tooltip
 } from '../index.esm';
 
@@ -48,5 +49,6 @@ Chart.register(
   Filler,
   Legend,
   Title,
+  SubTitle,
   Tooltip
 );