jest.config.json

{
  "extensionsToTreatAsEsm": [".ts", ".tsx"],
  "moduleNameMapper": {
    "^(\\.{1,2}/.*)\\.js$": "$1"
  },
  "preset": "ts-jest/presets/default-esm",
  "testPathIgnorePatterns": ["headless*", "developing.spec.ts"],
  "transform": {
    "\\.tsx?$": [
      "ts-jest",
      {
        "babelConfig": true,
        "useESM": true
      }
    ]
  }
}