diff --git a/tools/help.txt b/tools/help.txt
index c2da37edba..a8d720138f 100644
--- a/tools/help.txt
+++ b/tools/help.txt
@@ -475,6 +475,7 @@ Options:
   --test-app-path   Set the directory in which to create a temporary app used
                     for tests. Defaults to the system's temporary directory,
                     usually /tmp.
+  --velocity        Execute tests using phantomjs and exit
   --verbose         Print all output from builds logs.