How do I block Google Analytics on my local machine/testing environment?

You’ll need to add the google servers to your host file.

For Mac:

I manage mine with Gas Mask for Mac (download):

You’ll need to add these two lines:

127.0.0.1 www.google-analytics.com

127.0.0.1 google-analytics.com

127.0.0.1 ssl.google-analytics.com

If you’re on a PC:

Open your hosts file with a text editor to windows/system32/drivers/etc/hosts

You’ll need to add these two lines:

127.0.0.1 www.google-analytics.com

127.0.0.1 google-analytics.com

127.0.0.1 ssl.google-analytics.com

Restart your browser, especially if you’re using IE.