# Analytics

Pass rate over time, and which tests are slowest, flakiest, and busiest.

> **Plan:** available on the Advance plan and above.

The Analytics page aggregates runs across a date range so you can see trends rather than individual outcomes. It answers the questions a single run cannot: is our pass rate drifting, which test is eating the most time, and which one fails just often enough to be annoying.

![The Analytics page with totals, a runs-over-time chart, a pass-rate trend, and flakiest, slowest, and most active test lists.](https://testsnag.com/images/docs/running-tests/analytics-1-overview.r1.jpg)

Marked on the screenshot:
- Change the window: 7, 30, or 90 days.
- Totals for the window, with pass rate and average duration.
- Runs over time. A red band shows the day a failure appeared.
- Flakiest tests. This is the most useful list on the page: fix these or delete them.
- Most active tests, which is usually where your monthly allowance is going.

## What it shows

- A summary of total, passed, and failed runs, with the overall pass rate and average duration.
- A daily timeseries so you can see when a change in pass rate began.
- Slowest tests, ranked by average duration.
- Flakiest tests, the ones that alternate between passing and failing rather than staying broken.
- Busiest tests, ranked by how many runs they consume.

## Filtering by environment

If your workspace uses [environments](https://testsnag.com/docs/building-blocks/environments.md), an environment filter narrows every figure on the page to All environments, No environment, or one environment. Flakiness is worked out per test per environment, so a test that is stable on Production but flaky on Staging appears in the flakiest list with its Staging label.

## Reading the flakiest list

This is the most useful list on the page, because a flaky test is worse than a broken one. A test that always fails gets fixed. A test that fails one run in six trains everybody to ignore red, which eventually means ignoring a real failure. Anything appearing here is worth either fixing properly or removing.

## Watching the busiest list

If you are running out of monthly runs sooner than expected, the busiest list usually explains why. It is common to find one test on a five-minute schedule quietly consuming most of the allowance for a journey that would be fine checked hourly.