Jest is not recognized as an internal or external command

I just started the javascript track finished and submitted Hello World, but when I was to test the two-fer code and entered "npm test" I got this error:

> exercism-javascript@1.2.0 test C:\Users\patrick\Exercism\javascript\two-fer
> jest --no-cache ./*

'jest' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! Test failed. See above for more details.

Troubleshooting Information
===========================

Version
----------------
Current: 3.0.13
Latest: 3.0.13

Operating System
----------------
OS: windows
Architecture: amd64

Configuration
----------------
Home: C:\Users\Patrick
Workspace: C:\Users\Patrick\Exercism
Config: C:\Users\Patrick\AppData\Roaming\exercism
API key: d8ae*****************************57f

API Reachability
----------------

GitHub:
* https://api.github.com
* [connected]
* 247.9201ms

Exercism:
* https://api.exercism.io/v1/ping
* [connected]
* 348.8878ms