A hotfix test is a type of software testing that is performed on a small, urgent code change that is intended to resolve a critical production issue. The primary goal of a hotfix test is to verify that the code change fixes the issue and does not introduce any new problems into the system. Hot fix, however, is often a compromise: if quick regression testing shows that a hotfix causes new non-critical problems, then you still have to deploy it if rolling back the build is not an option.