When a bug is fixed, most teams retest the exact failure path once and move on.

That is understandable, but it leaves a gap: the team learned something from a real failure, then failed to turn that learning into reusable regression coverage.

Here is a lightweight template I use for turning resolved bugs into regression test cases that can be copied into a spreadsheet, Jira, TestRail, Qase, Xray, Zephyr, or any other QA workflow.

The CSV fields

For a bug fix regression test, I like these columns: