diff --git a/jest.config.js b/jest.config.js
index 0e2bb0431ea..85ff4ba0723 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -7,6 +7,7 @@ module.exports = {
     'tools/challenge-parser/',
     'tools/scripts/build/',
     'tools/scripts/lint/',
+    'shared',
     'curriculum',
     'client',
     'shared/'
diff --git a/package.json b/package.json
index d64e7fa46d5..d98bb188da8 100644
--- a/package.json
+++ b/package.json
@@ -70,7 +70,6 @@
     "serve:client-ci": "cd ./client && pnpm run serve-ci",
     "start": "npm-run-all create:shared -p develop:server serve:client",
     "test": "NODE_OPTIONS='--max-old-space-size=7168' run-s create:shared build:curriculum build-workers test:**",
-    "test:source": "jest",
     "test:api": "cd api && pnpm test",
     "test:tools:challenge-helper-scripts": "cd ./tools/challenge-helper-scripts && pnpm test run",
     "test:tools:scripts-build": "cd ./tools/scripts/build && pnpm test run",
@@ -78,8 +77,9 @@
     "test:tools:challenge-parser": "cd ./tools/challenge-parser && pnpm test run",
     "test:curriculum:content": "cd ./curriculum && pnpm test run",
     "test:curriculum:tooling": "cd ./curriculum && pnpm vitest run",
-    "test-curriculum-full-output": "cd ./curriculum && pnpm run test:full-output run",
+    "test:shared": "cd ./shared && pnpm vitest run",
     "test:client": "cd ./client && pnpm test run",
+    "test-curriculum-full-output": "cd ./curriculum && pnpm run test:full-output run",
     "test-config": "jest config",
     "test-utils": "jest utils",
     "prepare": "husky",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1fd5275bc3d..90f8ea84286 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -779,7 +779,14 @@ importers:
         specifier: ^3.2.4
         version: 3.2.4(@types/node@20.12.8)(@vitest/ui@3.2.4)(jsdom@16.7.0)(msw@2.8.7(@types/node@20.12.8)(typescript@5.8.2))(terser@5.28.1)(tsx@4.19.1)(yaml@2.8.0)
 
-  shared: {}
+  shared:
+    devDependencies:
+      '@vitest/ui':
+        specifier: ^3.2.4
+        version: 3.2.4(vitest@3.2.4)
+      vitest:
+        specifier: ^3.2.4
+        version: 3.2.4(@types/node@20.12.8)(@vitest/ui@3.2.4)(jsdom@26.1.0)(msw@2.8.7(@types/node@20.12.8)(typescript@5.8.2))(terser@5.28.1)(tsx@4.19.1)(yaml@2.8.0)
 
   tools/challenge-editor/api:
     dependencies:
diff --git a/shared/config/catalog.test.ts b/shared/config/catalog.test.ts
index 42b46c521ba..012e72a93ca 100644
--- a/shared/config/catalog.test.ts
+++ b/shared/config/catalog.test.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import { catalogSuperBlocks } from './curriculum';
 import { catalog } from './catalog';
 
diff --git a/shared/config/certification-settings.test.ts b/shared/config/certification-settings.test.ts
index 312eb6b24f5..c2db72d3069 100644
--- a/shared/config/certification-settings.test.ts
+++ b/shared/config/certification-settings.test.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import { Certification, linkedInCredentialIds } from './certification-settings';
 
 describe('linkedInCredentialIds', () => {
diff --git a/shared/config/constants.test.ts b/shared/config/constants.test.ts
index afb3f3840ed..e833628ce01 100644
--- a/shared/config/constants.test.ts
+++ b/shared/config/constants.test.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import { blocklistedUsernames } from './constants';
 
 describe('constants', () => {
diff --git a/shared/config/curriculum.test.ts b/shared/config/curriculum.test.ts
index 1dc3bdc4a49..fb67f1d6097 100644
--- a/shared/config/curriculum.test.ts
+++ b/shared/config/curriculum.test.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import { Languages } from './i18n';
 import {
   SuperBlocks,
diff --git a/shared/package.json b/shared/package.json
index b896772fa54..49470089422 100644
--- a/shared/package.json
+++ b/shared/package.json
@@ -9,6 +9,9 @@
     "node": ">=16",
     "pnpm": ">=10"
   },
+  "scripts": {
+    "test": "vitest"
+  },
   "type": "module",
   "repository": {
     "type": "git",
@@ -17,5 +20,9 @@
   "bugs": {
     "url": "https://github.com/freeCodeCamp/freeCodeCamp/issues"
   },
-  "homepage": "https://github.com/freeCodeCamp/freeCodeCamp#readme"
+  "homepage": "https://github.com/freeCodeCamp/freeCodeCamp#readme",
+  "devDependencies": {
+    "vitest": "^3.2.4",
+    "@vitest/ui": "^3.2.4"
+  }
 }
diff --git a/shared/utils/get-lines.test.ts b/shared/utils/get-lines.test.ts
index e3044167dcd..0eaaf6f1d3a 100644
--- a/shared/utils/get-lines.test.ts
+++ b/shared/utils/get-lines.test.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import { getLines } from './get-lines';
 
 const content = 'one\ntwo\nthree';
diff --git a/shared/utils/polyvinyl.test.ts b/shared/utils/polyvinyl.test.ts
index a040223b939..372ae8ce540 100644
--- a/shared/utils/polyvinyl.test.ts
+++ b/shared/utils/polyvinyl.test.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import { createPoly, createSource } from './polyvinyl';
 
 const polyData = {
diff --git a/shared/utils/validate.test.ts b/shared/utils/validate.test.ts
index 7ad84ab327c..b9005ae0070 100644
--- a/shared/utils/validate.test.ts
+++ b/shared/utils/validate.test.ts
@@ -1,3 +1,4 @@
+import { describe, it, expect } from 'vitest';
 import {
   isValidUsername,
   usernameTooShort,