doc: reword "test directory"

LiviaMedeiros · targos · commit fb96c5e13e80 · 2022-07-12T06:56:09.000+02:00
PR-URL: #42817 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Mestery <mestery@protonmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com>
diff --git a/BUILDING.md b/BUILDING.md
@@ -340,7 +340,8 @@ by providing the name of a subsystem:
 $ tools/test.py child-process
 ```
 
-You can also execute the tests in a tests directory (such as `test/message`):
+You can also execute the tests in a test suite directory
+(such as `test/message`):
 
 ```text
 $ tools/test.py test/message
