npm overwrite locally package

I have read many questions and articles but I don't have found a solution.

I have an npm package installed into my system, and I'm developing its new version.

I have download my repository make some updates and after I have followed the npm guide so I have done in this way inside my package folder:

npm install . -g
npm link
cd ../some-other-folder
npm install ../my-package

After these command I tried to launch my nom like:

my-package

But return me the same thing that old version, updates aren't shown.

How can I fix It?

How can I test my locally updates?

via Alessandro Minoccheri