Validation Error: Module jest-circus/runner in the testRunner option was not found.

Description

I recently updated my version of Detox from 19.4.2 to 19.7.1, and now I’m seeing this error when I attempt to run my Detox tests:

Module jest-circus/runner in the testRunner option was not found.
     <rootDir> is: /Users/myuser/Documents/my-app/e2e

config.json

{
    "maxWorkers": 1,
    "testEnvironment": "./environment",
    "testRunner": "jest-circus/runner",
    "testTimeout": 120000,
    "testRegex": "\\.e2e\\.js$",
    "setupFilesAfterEnv": ["./jest.setup.js"],
    "reporters": ["detox/runners/jest/streamlineReporter"],
    "verbose": true
}

environment.js

const {
  DetoxCircusEnvironment,
  SpecReporter,
  WorkerAssignReporter,
} = require('detox/runners/jest-circus')

class CustomDetoxEnvironment extends DetoxCircusEnvironment {
  constructor(config, context) {
    super(config, context)

    // Can be safely removed, if you are content with the default value (=300000ms)
    this.initTimeout = 300000

    // This takes care of generating status logs on a per-spec basis. By default, Jest only reports at file-level.
    // This is strictly optional.
    this.registerListeners({
      SpecReporter,
      WorkerAssignReporter,
    })
  }
}

module.exports = CustomDetoxEnvironment

Your environment

Detox version: 19.7.1 React Native version: 0.66.3 Node version: 6.12.0 Device model: MacBook Pro, running tests on an android emulator (Pixel API 29 AOSP) OS: macOS Big Sur (11.6.5) Test-runner: jest-circus

[noomorph]

You need to install jest-circus then:

npm install --save-dev jest-circus@26

[noomorph]

I can’t say for sure, but actually jest-circus@26 is an optional dependency – you need it only if you run with the old Jest. The modern versions of Jest (27 and 28) have the circus out of the box. Make sure to upgrade your Jest whenever you can.