diff --git a/types/passport/passport-tests.ts b/types/passport/passport-tests.ts
index 9cd246e7f5..23058684a7 100644
--- a/types/passport/passport-tests.ts
+++ b/types/passport/passport-tests.ts
@@ -148,7 +148,9 @@ declare global {
 
 app.use((req: express.Request, res: express.Response, next: (err?: any) => void) => {
     if (req.user) {
-        req.user!.username = "hello user";
+        if (req.user.username) {
+            req.user.username = "hello user";
+        }
     }
     next();
 });