This documentation covers pre-stable Vitest v0 (old version). For the latest version, see https://vitest.dev.

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Common Errors

Cannot find module './relative-path'

If you receive an error that module cannot be found, it might mean several different things:

    1. You misspelled the path. Make sure the path is correct.
    1. It's possible that your rely on baseUrl in your tsconfig.json. Vite doesn't take into account tsconfig.json by default, so you might need to install vite-tsconfig-paths yourself, if you rely on this behaviour.
ts
import { defineConfig } from 'vitest/config'
import tsconfigPaths from 'vite-tsconfig-paths'

export default defineConfig({
  plugins: [tsconfigPaths()]
})
import { defineConfig } from 'vitest/config'
import tsconfigPaths from 'vite-tsconfig-paths'

export default defineConfig({
  plugins: [tsconfigPaths()]
})

Or rewrite your path to not be relative to root:

diff
- import helpers from 'src/helpers'
+ import helpers from '../src/helpers'
- import helpers from 'src/helpers'
+ import helpers from '../src/helpers'
    1. Make sure you don't have relative aliases. Vite treats them as relative to the file where the import is instead of the root.
diff
import { defineConfig } from 'vitest/config'

export default defineConfig({
  test: {
    alias: {
-     '@/': './src/',
+     '@/': new URL('./src/', import.meta.url).pathname,
    }
  }
})
import { defineConfig } from 'vitest/config'

export default defineConfig({
  test: {
    alias: {
-     '@/': './src/',
+     '@/': new URL('./src/', import.meta.url).pathname,
    }
  }
})

Released under the MIT License.