Separate environment for hotfixes brach?

Currently we moved to gitflow branching model. We defined 2 environments for QA: testing, staging. Code from develop branch is deployed to testing environment, and code from /release branch goes to staging environment. Now we have to apply a hotfix. So we created a separate hotfix branch from master, fixed the bug, and... Where can we test this? Should we have a separate PreProduction env? I'm not sure I should test in on staging, cause on staging we may have a new release under test.