How to configure Mocha with VS Code

Hi I'm trying to setup Mocka and Chai frameworks with Visual Studio Code but I'm getting error when I'm trying to run mocha unit test:

http://prikachi.com/images/321/9672321w.png

It must be something from the settings. This is the JSON config file of VS Code launch.json

{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
    {
        "type": "node",
        "request": "launch",
        "name": "Mocha Tests",
        "program": "${workspaceFolder}/node_modules/mocha/bin/_mocha",
        "args": [
            "-u",
            "bdd",
            "--timeout",
            "999999",
            "--colors",
            "${file}"
        ],
        "internalConsoleOptions": "openOnSessionStart"
    },
    {
        "type": "node",
        "request": "launch",
        "name": "Launch Program",
        "program": "${file}"
    }
]

}