Test accounts can be used to test your integration without it affecting the data in your HubSpot production account. Test accounts have access to Enterprise versions of the HubSpot Marketing, Sales, and Service Hubs, allowing you to test most of the HubSpot tools and APIs.
You'll need to have a Developer account to create test accounts. If you don't already have one, you can sign up for one here:
Once you sign into your Developer account, you'll see a link to Testing in the navigation menu.
On the Testing dashboard, click the orange button in the top right to create a new test account. The Testing dashboard will also show you any previously created test accounts, their expiration date, and whether the accounts are active or expired.
Test accounts automatically expire after 90 days, so if you're using a test account you'll need to renew it using the Renew button in the row for the account. Renewing an account sets it to expire 90 days from when you click the renew button. Expired accounts can be renewed up to 90 days after they originally expired.