To ensure a complex parachute system for crewed or planetary landers works as planned, the parachutes are tested. These tests are often part of the mission, but for some missions, a dedicated parachute mission is set up. This page discusses these dedicated parachute test missions. This page also discusses missions that are flown to demonstrate the atmospheric entry ability of a mission.
Missions including PEPP, ASPIRE, and Supermax are just several missions that tested parachutes at extreme conditions. These missions ensure other missions, such as Mars landers, have a safe landing.