diff --git a/README.md b/README.md
index d66646e..8f7ca3a 100644
--- a/README.md
+++ b/README.md
@@ -46,5 +46,5 @@ $sortedIntervals = $tree->getKeys();
 ## Tests
 
 ```
-./vendor/bin/phpunit
+./vendor/bin/phpunit tests
 ```