percona-server-test 5.6.22-rel71.0-0ubuntu4 (amd64 binary) in ubuntu xenial

 (metapackage depending on the latest version)
 This is an empty package that depends on the current "best" version of
 percona-server-test (currently percona-server-test-5.6), as determined
 by the Percona Server maintainers. Install this package if in doubt
 about which Percona Server version you want, as this is the one we consider
 to be in the best shape.