@admin-bro/express/test/jest.json

This is an official AdminBro plugin which integrates it to expressjs framework

{
    "moduleFileExtensions": ["js", "json", "ts", "tsx"],
    "rootDir": ".",
    "testEnvironment": "node",
    "testRegex": ".test.ts$",
    "transform": {
      "^.+\\.(t|j)sx?$": "ts-jest"
    },
    "testTimeout": 10000
  }