@corbinu/eslint-plugin-corbinu/jestrc.json

{
    "env": {
        "jest/globals": true
    },
    "plugins": [
        "jest"
    ],
    "extends": [
        "plugin:jest/recommended"
    ],
    "rules": {
        "jest/prefer-to-be-null": "error",
        "jest/prefer-to-be-undefined": "error"
    }
}