/usr/lib/mysql-testsuite/ is in percona-xtradb-cluster-testsuite-5.5 5.5.34-25.9+dfsg-0ubuntu4.
This file is owned by root:root, with mode 0o755.
There are a lot of files here (6705 total).
We're only showing the immediate contents of /usr/lib/mysql-testsuite
.