From 98afd92563a483881674df02f1ef06afcff0bc74 Mon Sep 17 00:00:00 2001
From: OGordoo <marcosafonso8@hotmail.com>
Date: Thu, 9 Jan 2020 12:38:28 +0000
Subject: [PATCH] add instruction test file

---
 subjects/groupie-trackers/groupie-trackers-filters.en.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/subjects/groupie-trackers/groupie-trackers-filters.en.md b/subjects/groupie-trackers/groupie-trackers-filters.en.md
index f910b97f..7f0d4b9a 100644
--- a/subjects/groupie-trackers/groupie-trackers-filters.en.md
+++ b/subjects/groupie-trackers/groupie-trackers-filters.en.md
@@ -33,3 +33,4 @@ This project will help you learn about:
 - The backend must be written in **Go**.
 - You must handle website errors.
 - The code must respect the [good practices](https://github.com/01-edu/public/blob/master/subjects/good-practices.en.md)
+- It is recommended that the code should present a **test file**.