diff --git a/tests/functional/fake-amo-server.js b/tests/functional/fake-amo-server.js
index 7d87dcab18..2e6079ef66 100755
--- a/tests/functional/fake-amo-server.js
+++ b/tests/functional/fake-amo-server.js
@@ -90,7 +90,7 @@ http
       process.exit(1);
     }
   })
-  .listen(8989, os.platform() === 'win32' ? '::1' : '127.0.0.1', () => {
+  .listen(8989, 'localhost', () => {
     process.stdout.write('listening');
     process.stdout.uncork();
   });