Test:unit not showing any results

[willbeh]

I just created a new project using vue cli (typescript, babel, testing). No changes was done.

"dependencies": {
    "core-js": "^3.8.3",
    "register-service-worker": "^1.7.2",
    "vue": "^3.0.4",
    "vue-router": "^4.0.3"
  },
  "devDependencies": {
    "@types/jest": "^26.0.20",
    "@typescript-eslint/eslint-plugin": "^4.15.1",
    "@typescript-eslint/parser": "^4.15.1",
    "@vue/cli-plugin-babel": "~5.0.0-beta.2",
    "@vue/cli-plugin-e2e-cypress": "~5.0.0-beta.2",
    "@vue/cli-plugin-eslint": "~5.0.0-beta.2",
    "@vue/cli-plugin-pwa": "~5.0.0-beta.2",
    "@vue/cli-plugin-router": "~5.0.0-beta.2",
    "@vue/cli-plugin-typescript": "~5.0.0-beta.2",
    "@vue/cli-plugin-unit-jest": "~5.0.0-beta.2",
    "@vue/cli-service": "~5.0.0-beta.2",
    "@vue/compiler-sfc": "^3.0.4",
    "@vue/eslint-config-typescript": "^7.0.0",
    "@vue/test-utils": "^2.0.0-0",
    "eslint": "^7.20.0",
    "eslint-plugin-vue": "^7.2.0",
    "ts-jest": "^26.5.3",
    "typescript": "~4.1.5",
    "vue-jest": "^5.0.0-0"
  },

When I run 'npm run test:unit' it just show

> [email protected] test:unit
> vue-cli-service test:unit

No result is shown.

If I run --verbose

npm info it worked if it ends with ok
npm verb cli [
npm verb cli   '/usr/local/bin/node',
npm verb cli   '/usr/local/bin/npm',
npm verb cli   'run',
npm verb cli   'test:unit',
npm verb cli   '--verbose'
npm verb cli ]
npm info using [email protected]
npm info using [email protected]
npm verb run-script [ 'pretest:unit', 'test:unit', 'posttest:unit' ]
npm info lifecycle [email protected]~pretest:unit: [email protected]
npm info lifecycle [email protected]~test:unit: [email protected]

> [email protected] test:unit /Users/willbeh/work/vue/keywork
> vue-cli-service test:unit

The example.spec.ts is as default.. no change was made to any file after the project is created.

Any idea what is the cause? The project can serve and build without any issue. e2e test works with cypress. Just the unit test is not showing any results