# How to fix the root cause of a failed reliability test

DevFeed: [How to fix the root cause of a failed reliability test](<https://devfeed.tech/articles/how-to-fix-the-root-cause-of-a-failed-reliability-test-11617.md>)

Original publisher: [Read original article](<https://www.gremlin.com/blog/how-to-fix-the-root-cause-of-a-failed-reliability-test>)

Author: Andre Newman

Published: 2025-01-21T00:00:00Z

Content type: tutorial

Language: en

Sources: [Gremlin Blog](<https://devfeed.tech/sources/gremlin-blog.md>)

Topics: [Resilience](<https://devfeed.tech/topics/resilience.md>), [Scalability](<https://devfeed.tech/topics/scalability.md>), [Availability](<https://devfeed.tech/topics/availability.md>), [cpu](<https://devfeed.tech/topics/cpu.md>), [Latency](<https://devfeed.tech/topics/latency.md>), [Network](<https://devfeed.tech/topics/network.md>), [observability](<https://devfeed.tech/topics/observability.md>), [TLS (Transport Layer Security)](<https://devfeed.tech/topics/tls.md>), [systems](<https://devfeed.tech/topics/systems.md>)

Tags: [availability](<https://devfeed.tech/tags/availability.md>), [blog](<https://devfeed.tech/tags/blog.md>), [chaos-engineering](<https://devfeed.tech/tags/chaos-engineering.md>), [cpu](<https://devfeed.tech/tags/cpu.md>), [gremlin](<https://devfeed.tech/tags/gremlin.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [latency](<https://devfeed.tech/tags/latency.md>), [metrics](<https://devfeed.tech/tags/metrics.md>), [network](<https://devfeed.tech/tags/network.md>), [resilience](<https://devfeed.tech/tags/resilience.md>), [scalability](<https://devfeed.tech/tags/scalability.md>), [systems](<https://devfeed.tech/tags/systems.md>), [tls](<https://devfeed.tech/tags/tls.md>)

## AI overview

This tutorial explains how to investigate failed Gremlin reliability tests and use their results to improve system resilience. It describes the Well-Architected Cloud Test Suite, covering scalability, redundancy, dependency failures, latency, and TLS certificate expiry, along with the role of Health Checks and observability metrics and alerts.

## Source excerpt

You've run your reliability tests, and unfortunately, some of them failed. No need to panic: we'll tell you how to turn that F into an A.