Admins can enable and disable assessment groups for the current term.
Step 1: Click on dashboard
Step 2: Choose the assessment from the subscribed assessments
Step 3: Click on enable/diablo button (power button looking icon) for the assessment group under Actions
(The picture above shows when an assessment has been enabled for testing)
Your assessment will be enabled or disabled based on your preference. It's important to make sure that assessments have been enabled before the students sit their online tests.