remix-project/libs/remix-tests/tsconfig.json

{
  "extends": "../../tsconfig.base.json",
  "compilerOptions": {
    "types": ["node", "jest"],
    "module": "commonjs",
    "esModuleInterop": true,
    "allowJs": true,
    "rootDir": "./",
  },
  "include": ["**/*.ts"]
}