diff --git a/types/easymde-test.ts b/types/easymde-test.ts
index dc0ec74..b7d9fb9 100644
--- a/types/easymde-test.ts
+++ b/types/easymde-test.ts
@@ -215,8 +215,21 @@ new EasyMDE({
 
 new EasyMDE({
     direction: 'ltr',
-})
+});
 
 new EasyMDE({
     direction: 'rtl',
-})
+});
+
+new EasyMDE({
+    previewRender: (plainText: string) => {
+        return '<pre>' + plainText + '</pre>';
+    }
+});
+
+new EasyMDE({
+    previewRender: (plainText: string, preview) => {
+        preview.innerHTML = '<pre>' + plainText + '</pre>';
+        return null;
+    }
+});