$ sudo apt-get update
$ sudo apt-get install libunity-mir-tests 

libunity-mir-tests is installed in your system.

Make ensure the libunity-mir-tests package were installed using the commands given below,

$ sudo dpkg-query -l | grep libunity-mir-tests *

You will get with libunity-mir-tests package name, version, architecture and description in a table

libunity-mir-tests package basic information: