June 1, 2026

• Fail rate metric. A new fail rate metric shows what share of a test’s commits ended in failure after retries. Filter by it with the fail> operator in FQL. Where flip rate captures how often a test changes outcome, fail rate captures how often it ends red.
• Worst result in the test history calendar. Each day in a test’s history calendar now reflects its worst result that day, so days where the test failed stand out at a glance.