Welcome to the community
I moved this discussion to it’s own topic. (from Blazing Fast Contracts Testing)
OpenZeppelin Test Environment greatly improves the time taken to run tests.
As per the Mocha test example, it is very similar to workflows using Mocha based tests, making it straight forward to migrate. (The tests for OpenZeppelin Contracts and OpenZeppelin SDK were migrated to OpenZeppelin Test Environment)
Whilst the tests don’t significantly change, the speed of running tests is a big improvement. In my opinion, this improves the speed of developing tests as I run tests many times whilst developing them.
For developers using test runners Jest or Ava, it allows tests to be developed to use their preferred test runners, again improving the experience.
OpenZeppelin Test Helpers integrates seamlessly with OpenZeppelin Test Environment, but it also supports Truffle tests and regular web3 workflows. So whether you use OpenZeppelin Test Environment or another workflow, you can make use of Test Helpers for things such as event emission, revert reasons, which all make it easier to write tests.