# How can I solve problem when run test my created node, 'mocha' is not recognized as an internal or external command, operable program or batch file
**URL:** https://discourse.nodered.org/t/how-can-i-solve-problem-when-run-test-my-created-node-mocha-is-not-recognized-as-an-internal-or-external-command-operable-program-or-batch-file/57374
**Category:** Developing Nodes
**Created:** [28 January 2022 00:40 UTC](https://discourse.nodered.org/t/how-can-i-solve-problem-when-run-test-my-created-node-mocha-is-not-recognized-as-an-internal-or-external-command-operable-program-or-batch-file/57374 "2022-01-28T00:40:54Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@studiobox](https://discourse.nodered.org/u/studiobox)
#### Post date: [28 January 2022 00:40 UTC](https://discourse.nodered.org/t/how-can-i-solve-problem-when-run-test-my-created-node-mocha-is-not-recognized-as-an-internal-or-external-command-operable-program-or-batch-file/57374/1 "2022-01-28T00:40:54Z")
Hi all,
I have some problem about unit test my created node.
After I follow help for adding test into my created node.
[node-red-node-test-helper - npm (npmjs.com)](https://www.npmjs.com/package/node-red-node-test-helper)
Then, I run command "npm test", the error has occur.
> 'mocha' is not recognized as an internal or external command, operable program or batch file.
How can I solve this problem? 🤔
Please advice me.
---
### Author:  [@knolleary](https://discourse.nodered.org/u/knolleary)
#### Post date: [28 January 2022 07:46 UTC](https://discourse.nodered.org/t/how-can-i-solve-problem-when-run-test-my-created-node-mocha-is-not-recognized-as-an-internal-or-external-command-operable-program-or-batch-file/57374/2 "2022-01-28T07:46:50Z")
In your custom node's package.json file have you defined a "test" script and if so, what is it set to?
Have you added mocha as a devDependency of your module?
---
### Author:  [@studiobox](https://discourse.nodered.org/u/studiobox)
#### Post date: [28 January 2022 15:02 UTC](https://discourse.nodered.org/t/how-can-i-solve-problem-when-run-test-my-created-node-mocha-is-not-recognized-as-an-internal-or-external-command-operable-program-or-batch-file/57374/3 "2022-01-28T15:02:38Z")
Thank you very much for your reply. 😊
I added "test" in my package.json. But I did not add "mocha" as a devDependencies. So I must add "mocha", right? 🤔
Below is my package.json
```auto
{
"name": "node-red-contrib-node-line-api",
"version": "1.0.0",
"description": "Node Red with LINE API such as LINE Notify and other",
"license": "Apache-2.0",
"dependencies": {
"axios": "^0.24.0",
"form-data": "4.0.0",
"querystring": "^0.2.0"
},
"main": "node.js",
"node-red": {
"nodes": {
"node-line-notify": "nodes/node-line-notify.js"
}
},
"devDependencies": {
"node-red": "^2.2.0",
"node-red-node-test-helper": "^0.2.7"
},
"scripts": {
"test": "mocha \"test/**/*_spec.js\""
}
}
```
---
### Author:  [@knolleary](https://discourse.nodered.org/u/knolleary)
#### Post date: [28 January 2022 15:11 UTC](https://discourse.nodered.org/t/how-can-i-solve-problem-when-run-test-my-created-node-mocha-is-not-recognized-as-an-internal-or-external-command-operable-program-or-batch-file/57374/4 "2022-01-28T15:11:54Z")
If you have added a test script that wants to use mocha, then yes, you need to add mocha to your project.
---
### Author:  [@studiobox](https://discourse.nodered.org/u/studiobox)
#### Post date: [28 January 2022 16:38 UTC](https://discourse.nodered.org/t/how-can-i-solve-problem-when-run-test-my-created-node-mocha-is-not-recognized-as-an-internal-or-external-command-operable-program-or-batch-file/57374/5 "2022-01-28T16:38:57Z")
Thank you very much. 😊
After add mocha into my project. Now it can run test.
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [11 February 2022 16:39 UTC](https://discourse.nodered.org/t/how-can-i-solve-problem-when-run-test-my-created-node-mocha-is-not-recognized-as-an-internal-or-external-command-operable-program-or-batch-file/57374/6 "2022-02-11T16:39:36Z")
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