diff --git a/test/wasi/test-wasi-start-validation.js b/test/wasi/test-wasi-start-validation.js
index 80fc035d7c9826..2a5cb764943f80 100644
--- a/test/wasi/test-wasi-start-validation.js
+++ b/test/wasi/test-wasi-start-validation.js
@@ -1,3 +1,4 @@
+// Flags: --experimental-wasi-unstable-preview0
 'use strict';
 
 require('../common');