diff --git a/gulp/tasks/dev.js b/gulp/tasks/dev.js
index 732908b239a..0bbc3d7f2e6 100644
--- a/gulp/tasks/dev.js
+++ b/gulp/tasks/dev.js
@@ -22,7 +22,7 @@ require('./test');
 function watchDevFiles() {
   const stream = gulp.watch([
     `${config.root}/src/**/*.ts`,
-    `${config.root}/tests/unit/**/*`,
+    config.paths.test.unit
   ], gulp.parallel('test:unit'));
 
   stream.on('error', () => {});