GoogleChrome/lighthouse · error · Error

Invalid Audit type

Error message

Invalid Audit type 

What it means

Error "Invalid Audit type " thrown in GoogleChrome/lighthouse.

Source

Thrown at core/config/config-helpers.js:207

 * Expands the audits from user-specified JSON to an internal audit definition format.
 * @param {LH.Config.AuditJson} audit
 * @return {{id?: string, path: string, options?: {}} | {id?: string, implementation: Audit, path?: string, options?: {}}}
 */
function expandAuditShorthand(audit) {
  if (typeof audit === 'string') {
    // just 'path/to/audit'
    return {path: audit, options: {}};
  } else if ('implementation' in audit && typeof audit.implementation.audit === 'function') {
    // {implementation: AuditClass, ...}
    return audit;
  } else if ('path' in audit && typeof audit.path === 'string') {
    // {path: 'path/to/audit', ...}
    return audit;
  } else if ('audit' in audit && typeof audit.audit === 'function') {
    // just AuditClass
    return {implementation: audit, options: {}};
  } else {
    throw new Error('Invalid Audit type ' + JSON.stringify(audit));
  }
}

/** @type {Map<string, Promise<any>>} */
const bundledModules = new Map(/* BUILD_REPLACE_BUNDLED_MODULES */);

/**
 * Wraps `import`/`require` with an entrypoint for bundled dynamic modules.
 * See build-bundle.js
 * @param {string} requirePath
 */
async function requireWrapper(requirePath) {
  // For windows.
  if (path.isAbsolute(requirePath)) {
    requirePath = url.pathToFileURL(requirePath).href;
  }

  /** @type {any} */

View on GitHub (pinned to 9515cd4e58)

Solutions

1. Ensure the audit module exports a class that extends the base Audit class.
2. Check that the audit's path in your config points to the correct file.
3. Verify the audit class is exported as the default export.

When it happens

Trigger: Thrown when a configured audit does not extend the Audit base class or fails audit validation.

Common situations: See trigger scenarios.

AI-assisted analysis of GoogleChrome/lighthouse@9515cd4e58 (2026-08-13). Data as JSON: /api/errors/7a4018de3bf92674. Report an issue: GitHub.