How to Explain a Flaky Test Quarantine Policy in English
Learn the English phrases for proposing, explaining, and enforcing a flaky test quarantine policy with a team, without it becoming a place tests go to be forgotten.
A flaky test — one that intermittently fails without any real code change — erodes trust in a test suite faster than almost anything else. A quarantine policy (moving flaky tests out of the blocking suite while they’re investigated) is a common fix, but it needs to be explained carefully in English, or it quietly becomes a graveyard where tests go to be ignored forever. This guide covers the phrases for proposing and enforcing that policy clearly.
Proposing the Policy
Frame quarantine as a temporary holding area with an expiry, not a permanent exemption.
- “I’d like to propose a quarantine process for flaky tests — instead of blocking every merge, we move a confirmed-flaky test out of the required suite for a fixed window while someone investigates.”
- “The key word here is temporary — quarantine isn’t a place tests go to die, it’s a two-week holding pen with an owner and a deadline.”
- “Without a policy like this, people are already working around flaky tests informally — re-running CI, ignoring red builds — this just makes that visible and tracked instead of ad hoc.”
Defining What Qualifies
Be precise about the bar for quarantining a test, so it isn’t used as an escape hatch for genuine bugs.
- “A test qualifies for quarantine if it’s failed intermittently at least three times with no corresponding code change — not just ‘it failed once and I’m in a hurry.’”
- “If the failure is reproducible even occasionally under the same conditions, that’s a real bug, not flakiness — it doesn’t belong in quarantine.”
- “Quarantine is for the test’s reliability, not a way to silence a test that’s correctly catching a real regression.”
Assigning Ownership
A quarantine without an owner is where tests disappear permanently — be explicit about who’s responsible.
- “Every quarantined test needs an owner and a ticket — no exceptions, even if the fix looks trivial.”
- “Whoever quarantines the test is responsible for triaging it within the window, not just tagging it and moving on.”
- “If nobody owns it after two weeks, the default is to delete the test, not extend the quarantine indefinitely.”
Handling Pushback
Some team members will worry quarantine hides problems rather than solving them — address that directly.
- “I understand the concern that this could become a way to avoid fixing tests — that’s exactly why we’re pairing it with a hard expiry and a visible dashboard of what’s currently quarantined.”
- “The alternative isn’t ‘no flaky tests’ — it’s flaky tests silently blocking merges and everyone re-running CI without a paper trail. This makes the problem visible instead of invisible.”
- “We’ll review the quarantine list in the weekly engineering sync, so it stays a shared responsibility, not one person’s forgotten backlog.”
Reporting on Quarantine Health
Regularly surface the state of the quarantine list so it doesn’t grow silently.
- “This week we had four tests in quarantine — two got fixed and un-quarantined, one got deleted as obsolete, one is still being investigated and needs a new owner.”
- “The quarantine list has been growing for a month without anything coming out of it — that tells us the process is broken, not that we suddenly have more flaky tests.”
Vocabulary Reference
| Term | Meaning |
|---|---|
| Flaky test | A test that intermittently fails without a corresponding code change |
| Quarantine | Temporarily removing a test from the blocking/required suite while it’s investigated |
| Reproducible failure | A failure that can be triggered reliably under known conditions (not flakiness) |
| Escape hatch | An exception mechanism that can be misused to avoid doing the harder, correct work |
Key Takeaways
- Frame quarantine explicitly as temporary, with an expiry — not a place tests go to be forgotten.
- Define a precise bar for what qualifies as flaky, distinct from a genuine, reproducible bug.
- Assign an owner and a ticket to every quarantined test — an ownerless quarantine is where trust breaks down.
- Address the “this hides problems” concern directly by pairing quarantine with visibility and a hard deadline.
- Report on quarantine health regularly so a growing, stagnant list gets caught early.
Navigating Nuance: Phrasing for Test Quarantine in International Teams
Let’s face it: “flaky test” is a phrase that can quickly become a source of frustration and misunderstanding. It carries an inherent implication of fault, which isn’t always the intention when discussing a complex testing process like quarantine. For non-native English speakers, particularly those still developing their professional vocabulary, this can be incredibly challenging to articulate clearly and effectively. The key is moving beyond simply stating what the problem is to explaining why it’s happening and proposing a solution in a way that respects everyone’s understanding of the testing workflow.
Consider a scenario during a code review. A senior engineer, Sarah, spots multiple tests repeatedly failing within the quarantine process. Instead of writing “These tests are flaky – fix them!” she might say: “I’ve noticed several tests consistently entering the quarantine state. Could we investigate the root cause? It seems like some dependencies or external services aren’t reliably available during these test runs, which is triggering the quarantine behavior. Perhaps adding a short delay before running these tests, or investigating potential timeouts within the system, would help stabilize them.” Notice how Sarah frames it as an investigation rather than an accusation, and uses more precise language – “consistently entering,” “triggering behavior” – to convey complexity.
Similarly, in a Slack message explaining the quarantine policy to a junior developer, you might say: “Hey [Developer Name], just a quick note about the quarantine process. When tests end up there, it generally indicates an issue with external resources or dependencies that aren’t yet ready when the test is executed. We’re aiming for proactive identification of these problems – not penalizing the tests themselves. Think of the quarantine as a signal to investigate potential instability rather than a reason to discard the test.” The emphasis here is on collaboration and shared responsibility.
Finally, in a Pull Request description, you could state: “This PR includes an updated strategy for handling tests that enter the quarantine stage. We’re implementing a monitoring system to identify common dependencies failing during execution. The quarantine will now serve as a diagnostic tool – flagging areas requiring further investigation rather than automatically marking tests as failed. We’ll also be tracking the frequency of these occurrences to prioritize remediation efforts.” This approach clearly communicates the purpose of the quarantine and sets expectations for ongoing monitoring and improvement, crucial elements when dealing with potentially sensitive feedback.