Sarah Chen
QA Lead & Technical Writer, TestKase
Sarah is a QA lead and technical writer at TestKase with deep expertise in AI-powered testing, test strategy, and quality best practices. She writes about the intersection of AI and software quality.
- 8+ years in QA & Test Strategy
- AI & Machine Learning in Testing
Articles by Sarah Chen
AI Duplicate Detection in Test Suites: Why It Matters
Learn how AI-powered semantic duplicate detection finds redundant test cases, reduces suite maintenance by 20-30%, and reveals hidden coverage gaps.
23 min readHow AI Is Changing Software Testing in 2026
Discover how AI transforms software testing with test generation, self-healing automation, defect prediction, and smarter QA workflows in 2026.
23 min readWhy Single-Page Accessibility Scans Miss Real Bugs (and What Multi-Page Audits Catch)
Single-URL accessibility scanners miss six entire categories of WCAG violations. Here's what falls through the gap, and how flow-aware audits catch the issues your users actually hit.
14 min readColor Contrast: The #1 Accessibility Violation (and How to Fix It in 30 Minutes)
Color contrast is roughly 38% of every accessibility scan report. Here's the math, the 8 patterns that fail in 90% of apps, and a designer-developer playbook for fixing them without breaking your brand.
13 min readWCAG 2.2 AA Compliance Checklist for Web Apps in 2026
A practical, engineer-grade WCAG 2.2 Level AA checklist with the exact tests, automated coverage, and a 4-week rollout plan for shipping accessible web apps.
17 min readManual vs Automated Testing: When to Use Each
Automate the wrong test and you get a brittle suite nobody trusts. Skip automation on the right one and you burn a person's week every sprint. Here's how to tell which is which.
8 min readDefinition of Done for QA: What It Should Really Include
Learn what a strong Definition of Done should include for QA — testing criteria, automation gates, bug thresholds, and documentation checklists that ship quality.
21 min readExploratory Testing in Agile: Techniques That Find Real Bugs
Learn proven exploratory testing techniques for agile teams including session-based testing, charters, heuristics, and note-taking strategies that find critical bugs.
23 min readBehavior-Driven Development (BDD): Does It Actually Work?
An honest guide to BDD — when it delivers value vs. becomes overhead. Covers Gherkin, Cucumber, Three Amigos, anti-patterns, and real-world implementation.
19 min readShift-Left Testing: How to Catch Bugs Before They're Expensive
Implement shift-left testing to catch bugs 10x cheaper. Learn requirements review, static analysis, TDD, and CI quality gates with real-world examples.
20 min readHow to Write Test Cases That Actually Catch Bugs
Master boundary value analysis, equivalence partitioning, and negative testing techniques to write QA test cases that catch real bugs before production.
20 min read