How can I run the tests in the Node.js source code?

I made some changes to the Node.js source code and wondered about whether these changes are valid. But I don't know how to run the tests written before in the "tests" folder.

I've been exploring the source code of Node.js recently in order to do some research. I use an early version of Node.js but I think it won't make much difference in testing. I found there are test files written in javascript and c. Additionally there is a python file in each folder together with its js test files. First I searched issues in GitHub repository for help about testing Node.js source code but failed. Then I asked Google but just got the answer about using Mocha or other tools to test programs running on Node.js. I also searched on stackoverflow but sadly found there is no answers for my question. A tests folder of Node.js has structure like this:

tests folder structure

I've tried to use python to run the python file in tests folder but failed. After reading the relevant code, I thought it should work but:<
Also I tried to use nodejs to run the javascript files. Some of tests ran but some of them didn't output. But running tests one by one is inefficient, I think there should be something wrong about my actions.