diff --git a/BUILDING.md b/BUILDING.md
index 8e43eb73d04434..ae94b8846e97d2 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -403,7 +403,7 @@ by providing the name of a subsystem:
 
 ```text
 $ make coverage-clean
-$ NODE_V8_COVERAGE=coverage/tmp tools/test.py -J --mode=release child-process
+$ NODE_V8_COVERAGE=coverage/tmp tools/test.py --mode=release child-process
 $ make coverage-report-js
 ```