vitest-dev/vitest · error · Error

pretty-format: Options "min" and "indent" cannot be used…

Error message

pretty-format: Options "min" and "indent" cannot be used together.

What it means

validateOptions rejects the combination of the 'min' option (single-line minimal output) with a non-zero 'indent' option, since they are semantically incompatible: min mode collapses whitespace and indentation has no meaning. Only indent: 0 (or undefined) is allowed with min.

Example fix

// before
format(value, { min: true, indent: 4 })
// after
format(value, { min: true })

if (options.min && options.indent != null && options.indent !== 0) {
  throw new Error('min and indent are incompatible; dropping indent')
}
const { indent, ...rest } = options
format(value, options.min ? rest : options)

function optionsAreCompatible(o: { min?: boolean; indent?: number }): boolean { return !(o.min && o.indent != null && o.indent !== 0) }

When it happens

Trigger: Calling format(value, { min: true, indent: 4 }); or a config layer merging min: true with a pre-set indent value.

Common situations: Inheriting a base config with indent and then enabling min; merging user config over defaults without reconciling the two; CI config setting both.

Related errors

• pretty-format: Unknown option
• Asymmetric matcher does not implement toAsymmetricMatcher()
• error.message
• Exact option does not support RegExp expected class names
• Expected a single value for option

AI-assisted analysis of vitest-dev/vitest@1fa9837ec2 (2026-08-11). Data as JSON: /api/errors/baefa5d734bd50e0. Report an issue: GitHub.

Appendix: source

Thrown at packages/pretty-format/src/index.ts:476

  printBasicPrototype: true,
  printFunctionName: true,
  printShadowRoot: true,
  theme: DEFAULT_THEME,
  singleQuote: false,
  quoteKeys: true,
  spacingInner: '\n',
  spacingOuter: '\n',
} satisfies Options

function validateOptions(options: OptionsReceived) {
  for (const key of Object.keys(options)) {
    if (!Object.hasOwn(DEFAULT_OPTIONS, key)) {
      throw new Error(`pretty-format: Unknown option "${key}".`)
    }
  }

  if (options.min && options.indent !== undefined && options.indent !== 0) {
    throw new Error(
      'pretty-format: Options "min" and "indent" cannot be used together.',
    )
  }
}

function getColorsHighlight(): Colors {
  return DEFAULT_THEME_KEYS.reduce((colors, key) => {
    const value = DEFAULT_THEME[key]
    const color = value && (styles as any)[value]
    if (
      color
      && typeof color.close === 'string'
      && typeof color.open === 'string'
    ) {
      colors[key] = color
    }
    else {
      throw new Error(

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