diff --git a/test/js/node/test/parallel/test-http-client-override-global-agent.js b/test/js/node/test/parallel/test-http-client-override-global-agent.js
index cc010a1e90..f8b2928940 100644
--- a/test/js/node/test/parallel/test-http-client-override-global-agent.js
+++ b/test/js/node/test/parallel/test-http-client-override-global-agent.js
@@ -1,3 +1,4 @@
+'use strict';
 const common = require('../common');
 const assert = require('assert');
 const http = require('http');