Test inside of tests instead of test

I saw that all of the tests in glitch for each projects in the Information Security and Quality Assurance are inside the tests folder instead of test which is the one that mocha look first when it is run. Are there any problems that might happen if we will going to change it to test folder name?

Here’s what we usually see for each projects.

public/client.js
public/style.css
tests/1_unit_tests.js
tests/2_functional_tests.js