nyc coverage shows 0%

i have been trying to use riteway, in one of my sideprojects. When trying to get it working with instanbul coverage report it shows 0% coverage.

I currently have only a single test.js file , it imports a class from another js file, and runs tests on it.

Output:

    ----------|---------|----------|---------|---------|-------------------
    File      | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
    ----------|---------|----------|---------|---------|-------------------
    All files |       0 |        0 |       0 |       0 |
    ----------|---------|----------|---------|---------|-------------------

  passed: 2,  failed: 0  of 2 tests  (4.1s)

package.json

   "test": "riteway -r @babel/register -r @babel/polyfill src/**/*-test.js",
    "coverage": "nyc npm run test  | tap-nirvana",

.babelrc

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": [
          "last 2 versions",
          "safari >= 7"
        ]
      }
    ],
  ],
  "plugins": ["istanbul"]
}

.nycrc

{
    "extends": "@istanbuljs/nyc-config-babel"
}

Start by reproducing the report with the package.json coverage command and the shown .babelrc and .nycrc configuration. Inspect how riteway, Babel, and nyc interact during the test run; done means the existing test.js execution produces nonzero coverage for the imported source file.