The Continuous Test Runner for Java
Testowl is an IntelliJ plugin that automatically runs relevant tests based on code changes, so you get instant feedback without running the entire test suite. Try it for free and boost your productivity.
Faster Feedback Loops
TestOwl delivers real-time feedback by running only the tests impacted by your changes.
Its smart test selection means you avoid full suite runs and get faster results with just a few targeted tests — keeping you in flow and speeding up your development cycle.
Pure Focus
TestOwl overlays real-time coverage and failing test indicators directly in your IntelliJ editor. You get immediate visual feedback on what code is covered, what’s not, and which lines are failing — all without leaving your current file. Stay focused, spot issues faster, and keep your flow uninterrupted.
Built for your workflow
TestOwl integrates directly into IntelliJ, so you can keep using your usual workflow — no extra tools, no context switching. All test feedback, coverage, and failure information appears exactly where you need it, when you need it. It feels like a native part of the IDE, not something bolted on.
Most Loved Features
Smart Test Execution
By analyzing your code changes in real time, only the tests impacted by your edits are executed — no full-suite overhead. What makes it even smarter: tests are prioritized based on your current editing context, so the most relevant ones run first. You get faster, focused feedback exactly where it matters most.
Actionable Test Insights
Stay informed with detailed feedback for every test run — including execution progress, stack traces on failure, and full StdOut logs. Everything is presented clearly inside your IDE, so you can diagnose issues quickly without switching tools or hunting through consoles.
Live Code Coverage Per Test
See code coverage update in real time as tests run — directly inside your editor. Coverage is shown per test case, so you can easily understand which parts of your code are exercised by which tests. This makes it simple to spot gaps, improve test quality, and debug more effectively — all without leaving your flow.
The Hidden Cost of Delayed Test Feedback — How Testowl Improves Productivity
Without Testowl, slow feedback means tests run less often—developers might only trigger tests a couple of times a day to avoid waiting around. This delay creates two costly issues:
- Delayed detection: When test failures are discovered long after code is written, developers lose the mental context, turning a quick fix (10 minutes) into a lengthy debugging session (about 45 minutes), adding an extra 35 minutes per failure.
- Fewer test runs: Running tests less frequently means more code changes accumulate before testing, increasing the chance and complexity of failures, making bugs harder and more time-consuming to diagnose.
By contrast, Testowl’s instant feedback encourages more frequent testing and catches problems right away—while the code and context are fresh—saving hours of debugging and keeping developers focused on what matters.
“We rely on the compiler to catch our mistakes instantly — why should tests be any different? Testowl brings that same instant feedback to your test suite.”
Samuel Motal – Creator of Testowl
Why Choose Testowl
Passionate
Built with a deep appreciation for the values of software craftsmanship and test-driven development, this work reflects a shared dedication to clean code, continuous learning, and meaningful impact. Every detail is shaped by someone who speaks the same language and understands what truly matters to those who take pride in their craft.
Community Driven
Shaped by the voices of those who use it, this product evolves through continuous feedback from a community of like-minded developers. Every feature, improvement, and detail is informed by real-world needs—ensuring it stays relevant, practical, and aligned with the standards of those who care deeply about their tools.
Support
Support is personal, not transactional. Every request is an opportunity for conversation, not just a ticket. Feedback isn’t just welcomed—it actively shapes the product. You’re not just a number, but part of a community whose input is genuinely valued and reflected in continuous improvement.