Why the plugin doesn't see files when files 100% exist in my test folder?
I want to run test for certain files only.
How do I do it with mocha?

My set up:

// test folder. Files are the same. Changed name for the sake of showing you an error
/test
    nock.js
    nock_test.js

// package.json
"scripts": { "test": "mocha" }

None of these work. All throw the same error:

$ npm test nock
$ npm test nock.js
$ npm test nock_test
$ npm test nock_test.js

Error:

Warning: Could not find any test files matching pattern: nock
Warning: Could not find any test files matching pattern: nock.js
Warning: Could not find any test files matching pattern: nock_test
Warning: Could not find any test files matching pattern: nock_test.js
No test files found
npm ERR! Test failed. See above for more details.

How it can be? No test files matching pattern? It is not even a pattern! It is exactly a file name.
How to run it?