Is retesting the same as confirmation testing?

Yes. "Confirmation testing" is the formal ISTQB term for retesting: you re-execute the test cases that previously failed, on a build that claims to contain the fix, to confirm the defect is resolved. The two terms are interchangeable.

Should retesting or regression testing come first?

Retesting first. Confirm the specific fix works before spending time on the wider regression pass. If the retest fails, the fix is not done and regression results around it would be meaningless.

Can you skip regression testing if the retest passes?

No. A passing retest only proves the one defect is fixed. It says nothing about side effects. A fix that touches shared code — a validation helper, an auth check, a date parser — can repair one path and quietly break three others, which only regression testing catches.

Can retesting be automated?

Not usually on the first pass, because you're verifying a brand-new fix for a defect that had no prior automated test. The durable move is to convert that reproduction into an automated test once it passes — then it becomes part of your regression suite and guards the fix forever.

Regression Testing vs. Retesting: What's the Difference?

Retesting (also called confirmation testing) re-runs the exact test case that failed to confirm a specific bug is now fixed. Regression testing re-runs a broader set of tests to confirm that the same change didn't break anything else. They answer two different questions — "is this defect gone?" versus "did fixing it cost me anything?" — and mature teams run both, in that order.

What is the difference between regression testing and retesting?

The distinction is scope and intent. Retesting is narrow and defect-driven: you take the precise steps, data, and environment that produced a failure and run them again against a build that claims to fix it. Regression testing is broad and change-driven: you re-execute tests across the areas a change could have affected, most of which were passing before, to catch collateral damage.

Trigger — Retesting is triggered by a specific fixed defect. Regression testing is triggered by any change: a fix, a feature, a dependency bump, or a config edit.
Target cases — Retesting re-runs cases that failed. Regression re-runs cases that were passing, to make sure they still do.
Predictability — Retesting is planned: you know exactly which case to run. A regression scope is inferred: you decide which areas the change could plausibly reach.
Automation timing — A retest is often manual on its first pass because the defect had no test yet. Regression is where automation pays off, because you run the same suite over and over.

What is retesting (confirmation testing)?

Retesting verifies one claim: this reported bug is fixed. You reproduce the original failure using the same inputs and environment, then confirm the corrected behavior. Because it's tied to a single defect, retesting is only as reliable as your original reproduction — which is why a good bug report matters so much. If the ticket doesn't carry exact steps, the environment, and evidence, the person retesting is guessing at what "fixed" even means.

Reproduce the original failure on the build before the fix, so you know your steps actually trigger it.
Re-run the identical steps on the build that contains the fix, using the same data and environment.
Confirm the corrected behavior — not just "no error," but the specific correct outcome the ticket described.
Record the result on the ticket so anyone can see what was verified and on which build.

Capturing the reproduction cleanly — URL, console, network, and environment in one place — is exactly what in-app bug reporting is for, and it makes the retest unambiguous instead of a re-hunt.

What is regression testing?

Regression testing checks that recent changes didn't reintroduce old bugs or break working behavior. The name comes from the software "regressing" to a worse state. The hard part isn't running the tests — it's scoping them. You almost never re-run everything for every change; you re-run what the change could reach.

Impacted-area tests — the modules that share code with what changed. A fix in a date parser touches every feature that formats dates.
Critical-path tests — sign-up, login, checkout, and any flow where a silent break is catastrophic, regardless of what changed.
Previously-broken tests — bugs that have returned once tend to return again, so their regression tests earn a permanent seat.

When should you run retesting vs. regression testing?

Sequence matters. Run retesting first: if the fix doesn't actually resolve the defect, there is no point running a regression pass around a fix that isn't real. Once the retest passes, run regression across the impacted and critical areas.

Retest the specific defect. Confirm the reported bug is gone on the fixed build.
If it fails, stop and reopen. Send it back with the current behavior and evidence; don't proceed to regression.
If it passes, run regression. Cover the code the fix touched plus your critical paths.
Promote the reproduction to an automated test. Convert the now-passing case into a permanent regression test so the same bug can't silently return.

Can retesting and regression testing be automated?

Regression testing is the clearest win for automation because you run the same checks on every change — but there's a catch: UI-driven regression suites break constantly when the interface shifts, and a renamed button or restructured page can turn a green suite red without any real defect. That maintenance cost is the reason many teams under-invest in regression exactly when they need it most.

This is where the retest-to-regression pipeline compounds. Every confirmed fix should become a durable test, and the durable form is one that survives cosmetic UI changes instead of failing on them. Klavity's AutoSim builds self-healing end-to-end tests that repair their own selectors when the UI changes, so a passing regression suite stays green for real reasons — and turning a bug into a regression test stops being a chore you skip under deadline.

Common mistakes with retesting and regression testing

Treating a passing retest as "done." It proves one defect is fixed, not that nothing else broke. Skipping regression is how fixes ship new bugs.
Regression-testing before the retest. Running a broad suite around an unverified fix wastes time and muddies which failures are real.
Never scoping regression, or scoping it to zero. "Run everything" is too slow to do per-change; "run nothing" lets side effects through. Scope to impacted areas plus critical paths.
Letting confirmed fixes evaporate. A bug you fixed but never captured as a test is a bug you'll fix again. Promote every retest into a regression test.