# Test the boundary in a trial

Lesson 3 of [Evaluate a sandbox provider before you commit](https://agentsandboxes.fyi/academy/evaluate-an-agent-sandbox-provider.md), 15 minutes.

A sandbox that you have not tested is a guess. Use a trial account and data that you can afford to expose. Keep production keys and customer data out of the first test. Set safe defaults first - Network off, then allow by name. Start with no outbound access. Add only the hosts that the task needs. -…

The rest of this lesson is for learners enrolled in the course. [See how Evaluate a sandbox provider before you commit works](https://agentsandboxes.fyi/academy/evaluate-an-agent-sandbox-provider.md).

Also on the [web page](https://agentsandboxes.fyi/academy/evaluate-an-agent-sandbox-provider/test-the-boundary).