tsconfig.test.json

{
  "compilerOptions": {
    "target": "ES6",
    "lib": ["DOM", "ESNext"],
    "module": "ESNext",
    "moduleResolution": "Node",
    "skipLibCheck": true,
    "esModuleInterop": true,
    "strict": true,
    "noImplicitAny": false,
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "stripInternal": true,
    "noUnusedLocals": true
  },
  "include": ["packages/*/test/**/*.ts"]
}