|Directory |Runs on CI |Purpose |

|-------------------|---------------|---------------|

|abort |Yes |Tests for when the ``` --abort-on-uncaught-exception ``` flag is used.|

|addons |Yes |Tests for [addon](https://nodejs.org/api/addons.html) functionality along with some tests that require an addon to function properly.|

|addons-napi |Yes |Tests for [n-api](https://nodejs.org/api/n-api.html) functionality.|

|async-hooks |Yes |Tests for [async_hooks](https://nodejs.org/api/async_hooks.html) functionality.|

|cctest |Yes |C++ tests that are run as part of the build process.|

|code-cache |No |Tests for a Node.js binary compiled with V8 code cache.|

|common | |Common modules shared among many tests. [Documentation](./common/README.md)|

|doctool |Yes |Tests for the documentation generator.|

|es-module |Yes |Test ESM module loading.|

|fixtures | |Test fixtures used in various tests throughout the test suite.|

|internet |No |Tests that make real outbound connections (mainly networking related modules). Tests for networking related modules may also be present in other directories, but those tests do not make outbound connections.|

|known_issues |Yes |Tests reproducing known issues within the system. All tests inside of this directory are expected to fail consistently. If a test doesn't fail on certain platforms, those should be skipped via `known_issues.status`.|

|message |Yes |Tests for messages that are output for various conditions (```console.log```, error messages etc.)|

|parallel |Yes |Various tests that are able to be run in parallel.|

|pseudo-tty |Yes |Tests that require stdin/stdout/stderr to be a TTY.|

|pummel |No |Various tests for various modules / system functionality operating under load.|

|sequential |Yes |Various tests that are run sequentially.|

|testpy | |Test configuration utility used by various test suites.|

|tick-processor |No |Tests for the V8 tick processor integration. The tests are for the logic in ```lib/internal/v8_prof_processor.js``` and ```lib/internal/v8_prof_polyfill.js```. The tests confirm that the profile processor packages the correct set of scripts from V8 and introduces the correct platform specific logic.|

|v8-updates |No |Tests for V8 performance integration.|