diff --git a/test.bat b/test.bat
index a38ea9b..fe7b616 100644
--- a/test.bat
+++ b/test.bat
@@ -5,6 +5,7 @@ rem The format of commands (i.e tests/node/commands.txt) must always contain a n
 set "loc=%~dp0tests"
 
 echo Package Manager Test
+metacall.bat npm install is-number
 metacall.bat npm
 metacall.bat pip