diff --git a/BUILDING.md b/BUILDING.md
index 8a23e7e1be7..79094ebaf90 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -327,7 +327,8 @@ 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