We want to make sure that your candidates complete the test and for that reason, by default we send them a reminder to do the test 7 days after the original invitation (in case they hadn't completed it before).
Candidates can respond to this reminder and you will receive it to the address that you set up when sending the invitation.
Can I adjust the reminder date?
You can adjust the default reminder date for the whole account in your account settings in My Account - Settings - Account Settings - Email Reminders:
You can also adjust it for each specific test, either at the last step of the test creation process or in Test Mission Control, under the Settings tab: