The Simmonds-Thompson test, also called the Thompson test or calf squeeze test, involves lying on your stomach with your feet hanging off the table and relaxing your ankles. A healthcare professional squeezes your lower calf above your ankle and observes the plantar flexion movement of your foot. The Matles test evaluates your ability to stand on your toes and push off the ground. Having difficulty doing this can indicate an Achilles tendon rupture.