vitest/docs/config/watchtriggerpatterns.md
2025-11-06 14:59:05 +01:00

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---
title: watchTriggerPatterns | Config
outline: deep
---
# watchTriggerPatterns <CRoot /> <Version>3.2.0</Version>
- **Type:** `WatcherTriggerPattern[]`
Vitest reruns tests based on the module graph which is populated by static and dynamic `import` statements. However, if you are reading from the file system or fetching from a proxy, then Vitest cannot detect those dependencies.
To correctly rerun those tests, you can define a regex pattern and a function that returns a list of test files to run.
```ts
import { defineConfig } from 'vitest/config'
export default defineConfig({
test: {
watchTriggerPatterns: [
{
pattern: /^src\/(mailers|templates)\/(.*)\.(ts|html|txt)$/,
testsToRun: (id, match) => {
// relative to the root value
return `./api/tests/mailers/${match[2]}.test.ts`
},
},
],
},
})
```
::: warning
Returned files should be either absolute or relative to the root. Note that this is a global option, and it cannot be used inside of [project](/guide/projects) configs.
:::