setup-node/jest.config.js

export default {
  clearMocks: true,
  moduleFileExtensions: ['js', 'ts'],
  testEnvironment: 'node',
  testMatch: ['**/*.test.ts'],
  testRunner: 'jest-circus/runner',
  extensionsToTreatAsEsm: ['.ts'],
  globals: {
    'ts-jest': {
      useESM: true
    }
  },
  transform: {
    '^.+\\.ts$': 'ts-jest'
  },
  preset: 'ts-jest/presets/default-esm',
  verbose: true
}