From 93f8f8cd8424c676ca752b27ba9f41b9735de076 Mon Sep 17 00:00:00 2001
From: Marian Buschsieweke <marian.buschsieweke@ovgu.de>
Date: Wed, 22 Apr 2020 22:33:58 +0200
Subject: [PATCH] tests/external_board_native: Extended readme

Added a note to explain why the deprecated variable BOARDSDIR is still used.
---
 tests/external_board_native/README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/external_board_native/README.md b/tests/external_board_native/README.md
index ba79ea8369..86d7f3576f 100644
--- a/tests/external_board_native/README.md
+++ b/tests/external_board_native/README.md
@@ -12,3 +12,7 @@ done as the 'board' module is implemented directly by the 'RIOT/boards/native'.
 
 If you are running an 'ubuntu-bionic' you could even compile the example in
 docker and run the test.
+
+*Note:* This test uses still the deprecated `BOARDSDIR` variable instead of the
+new `EXTERNAL_BOARD_DIRS` variable. This is by intent so that the CI can verify
+backward compatibility is still working as intended.