only execute last test when we are a pty
only execute last test when we are a pty

Signed-off-by: Christian Brauner <48455ab3070520a2d174545c7239d6d0fabd9a83@mailbox.org>

QingweiPeterLan/cs188-lxc,QingweiPeterLan/cs188-lxc,QingweiPeterLan/cs188-lxc