Jest can't find several files in the __tests__ folder - vue.js

Question

I want to use jest with vue.js framework. When I run yarn test:unit (eg. vue-cli-service test:unit) the only recognized file in the tests folder is the last, however I have several files.
I don't understand why. I tried to add the path of the folder tests, of the other files, without success
Could you help me please ?
I used vue add unit-jest in an existing project.
Here the structure of my project :
> __tests__
example.test.js
example1.test.js
example2.test.js
example3.test.js
example4.test.js
> src
// jest.config.js
module.exports = {
verbose: true,
preset: '#vue/cli-plugin-unit-jest',
testMatch: [
'<rootDir>/**/*.(test).{js,jsx,ts,tsx}',
'<rootDir>/**/?(*.)(spec|test).{js,jsx,ts,tsx}',
],
transformIgnorePatterns: ['/node_modules/(?!vuetify|vue-select)'],
setupFiles: ['./utils/setup.js'],
//.eslintrc
"env": {
"jest": true
}
// package.json
"scripts": {
"test:unit": "vue-cli-service test:unit --watch=all --coverage",
}
versions :
"#vue/test-utils": "^1.1.3",
"#vue/vue2-jest": "^27.0.0-alpha.2",
"babel-jest": "^27.0.6",
"jest": "^27.0.5",
"#vue/cli-plugin-unit-jest": "~5.0.0",
output :
PASS __tests__/example4.test.js (6.415 s)
App.vue
√ should return true (12 ms)
...
Test Suites: 1 passed, 1 total
Tests: 1 passed, 1 total
Snapshots: 0 total
Time: 7.217 s
Ran all test suites.
Done in 10.71s.

Answer 1

Not sure but can you try to replace the testMatch on config.jest.js to something like this?
testMatch: [
'<rootDir>/**/*.test.js',
],