diff --git a/jenkins.sh b/jenkins.sh
index 2faa3fd..06f9c8d 100755
--- a/jenkins.sh
+++ b/jenkins.sh
@@ -11,5 +11,5 @@ make test
 
 . ~/.emsdk_set_env.sh
 make js
-(cd javascript && npm run test)
+(cd javascript && npm install && npm run test)
 npm pack javascript