How to set global variable visible even for sudo commands?

I have installed Maven on Ubuntu 16.04 following instructions . I edited /etc/environmentand added path to **maven/bin** folder to **$PATH** variable. Under my normal user everything works just fine, but when I try to run e.g. sudo mvn test it tells me that **mvn** is unknown command. Restart didn't help. Error: /bin/sh: 1: mvn: not found I am also little perplexed by /bin/sh piece - I am using bash. So where should I put path to maven binary to make even sudo commands see it? Thank you.