Error: Install failed for yargs when running npm test, web-test-runner \"src/**/*.test.jsx\", web-test-runner not working

[jackprogramsjp]

I ran npm test, and here are the results:

$ npm test

> test
> web-test-runner "src/**/*.test.jsx"

[snowpack] starting server...
Error while running tests:
Error: Package "yargs" not found. Have you installed it?
    at Object.resolveEntrypoint (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:94190:15)
    at PackageSourceLocal.buildPackageImport (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:123257:34)    
    at async PackageSourceLocal.prepare (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:123060:13)
    at async Object.startServer (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:182486:9)
    at async Object.serverStart (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@snowpack\web-test-runner-plugin\plugin.js:33:16)    at async DevServer.start (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@web\dev-server-core\dist\server\DevServer.js:45:13)    at async TestRunnerServer.start (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@web\test-runner-core\dist\server\TestRunnerServer.js:49:9)
    at async TestRunner.start (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@web\test-runner-core\dist\runner\TestRunner.js:56:13)
    at async Object.startTestRunner (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@web\test-runner\dist\startTestRunner.js:49:9)

Ok, so then I install yargs by npm install yargs, and I try npm test again, here are results:

$ npm test

> test
> web-test-runner "src/**/*.test.jsx"

[snowpack] starting server...
[14:57:55] [snowpack] + yargs@17.0.1
[14:57:56] [esinstall:yargs] C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\yargs\lib\platform-shims\esm.mjs
   Module "assert" (Node.js built-in) is not available in the browser. Run Snowpack with --polyfill-node to fix.
[14:57:56] [esinstall:yargs] C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\yargs\lib\platform-shims\esm.mjs
   Module "util" (Node.js built-in) is not available in the browser. Run Snowpack with --polyfill-node to fix.
[14:57:56] [esinstall:yargs] C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\yargs\lib\platform-shims\esm.mjs
   Module "fs" (Node.js built-in) is not available in the browser. Run Snowpack with --polyfill-node to fix.
[14:57:56] [esinstall:yargs] C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\yargs\lib\platform-shims\esm.mjs
   Module "url" (Node.js built-in) is not available in the browser. Run Snowpack with --polyfill-node to fix.
[14:57:56] [esinstall:yargs] C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\yargs\lib\platform-shims\esm.mjs
   Module "path" (Node.js built-in) is not available in the browser. Run Snowpack with --polyfill-node to fix.
Error while running tests:
Error: Install failed for yargs.
    at Object.install (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:94753:23)
    at async Object.installPackages (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:122793:25)
    at async C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:123377:39
    at async PackageSourceLocal.buildPackageImport (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:123284:30)
    at async PackageSourceLocal.prepare (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:123060:13)
    at async Object.startServer (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\snowpack\lib\index.js:182486:9)
    at async Object.serverStart (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@snowpack\web-test-runner-plugin\plugin.js:33:16)    at async DevServer.start (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@web\dev-server-core\dist\server\DevServer.js:45:13)    at async TestRunnerServer.start (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@web\test-runner-core\dist\server\TestRunnerServer.js:49:9)
    at async TestRunner.start (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@web\test-runner-core\dist\runner\TestRunner.js:56:13)
    at async Object.startTestRunner (C:\Users\jackm\Desktop\JavaScript Projects\calculator\node_modules\@web\test-runner\dist\startTestRunner.js:49:9)

I followed exactly how the template-react did, same files in same directories, and everything (except for the content of the javascript files, which doesn't matter here): https://github.com/snowpackjs/snowpack/tree/main/create-snowpack-app/app-template-react

Here is my package.json (including yargs):

{
  "scripts": {
    "start": "snowpack dev",
    "build": "snowpack build",
    "format": "prettier --write \"src/**/*.{js,jsx}\"",
    "lint": "prettier --check \"src/**/*.{js,jsx}\"",
    "test": "web-test-runner \"src/**/*.test.jsx\""
  },
  "devDependencies": {
    "@snowpack/plugin-react-refresh": "^2.5.0",
    "@snowpack/web-test-runner-plugin": "^0.2.2",
    "@testing-library/react": "^12.0.0",
    "@web/test-runner": "^0.13.12",
    "chai": "^4.3.4",
    "prettier": "^2.3.2",
    "snowpack": "^3.3.7"
  },
  "dependencies": {
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "yargs": "^17.0.1"
  }
}

Why is web-test-runner not working? Why is it making Error: Install failed for yargs error? How should I fix this?