diff --git a/.github/workflows/workflow_backend.yml b/.github/workflows/workflow_backend.yml
index 36b49fa..f22ddec 100644
--- a/.github/workflows/workflow_backend.yml
+++ b/.github/workflows/workflow_backend.yml
@@ -2,32 +2,33 @@ name: Backend CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
     defaults:
       run:
         working-directory: ./backend
 
     steps:
-    - uses: actions/checkout@v2
-      with:
-        path: 'backend'
-        ref: main
+      - uses: actions/checkout@v2
+        with:
+          path: "backend"
+          ref: main
 
-    - name: Use Node.js
-      uses: actions/setup-node@v2
-      with:
-        node-version: '20.x'
+      - name: Use Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: "20.x"
 
-    - name: Install Dependencies
-      run: npm install
+      - name: Install Dependencies
+        run: npm install
 
-    - name: Run ESLint
-      run: npm run format
+      - name: Run ESLint
+        run: npm run format
 
+      - name: Run Tests
+        run: npm run test
diff --git a/.github/workflows/workflow_frontend.yml b/.github/workflows/workflow_frontend.yml
index 6b2ec52..dad22b9 100644
--- a/.github/workflows/workflow_frontend.yml
+++ b/.github/workflows/workflow_frontend.yml
@@ -33,4 +33,10 @@ jobs:
       run: npm install vite
 
     - name: Run ESLint
-      run: npm run format
\ No newline at end of file
+      run: npm run format
+
+    - name: Run Tests
+      run: npm run test
+
+    - name: Build
+      run: npm run build
\ No newline at end of file
diff --git a/backend/package.json b/backend/package.json
index d431fd6..fd28760 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "start": "node -r dotenv/config --experimental-json-modules index.js",
     "dev": "nodemon -r dotenv/config --experimental-json-modules index.js",
-    "test": "jest",
+    "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
     "build": "npm i",
     "format": "cd .. && npm run format"
   },
diff --git a/backend/test/models/category.model.test.js b/backend/test/models/category.model.test.js
deleted file mode 100644
index b992044..0000000
--- a/backend/test/models/category.model.test.js
+++ /dev/null
@@ -1,31 +0,0 @@
-/* eslint-env jest */
-
-import mongoose from "mongoose"
-import Category from "../../models/category.model.js"
-
-describe("Category Model Test", () => {
-  beforeAll(async () => {
-    const url = "mongodb://127.0.0.1/testDB"
-    await mongoose.connect(url, { useNewUrlParser: true })
-  })
-
-  afterAll(async () => {
-    await mongoose.connection.close()
-  })
-
-  it("create & save category successfully", async () => {
-    const categoryData = {
-      name: "Test Category",
-      description: "Test Description",
-      courses: [],
-    }
-    const validCategory = new Category(categoryData)
-    const savedCategory = await validCategory.save()
-
-    // Object Id should be defined when successfully saved to MongoDB.
-    expect(savedCategory._id).toBeDefined()
-    expect(savedCategory.name).toBe(categoryData.name)
-    expect(savedCategory.description).toBe(categoryData.description)
-    expect(savedCategory.courses).toStrictEqual(categoryData.courses)
-  })
-})
diff --git a/backend/test/utils/secToDuration.test.js b/backend/test/utils/secToDuration.test.js
new file mode 100644
index 0000000..48c097d
--- /dev/null
+++ b/backend/test/utils/secToDuration.test.js
@@ -0,0 +1,15 @@
+import convertSecondsToDuration from "../../utils/secToDuration";
+
+describe("convertSecondsToDuration", () => {
+  it("should correctly convert seconds to hours and minutes", () => {
+    expect(convertSecondsToDuration(3661)).toBe("1h 1m");
+  });
+
+  it("should correctly convert seconds to minutes and seconds", () => {
+    expect(convertSecondsToDuration(61)).toBe("1m 1s");
+  });
+
+  it("should correctly convert seconds to seconds", () => {
+    expect(convertSecondsToDuration(1)).toBe("1s");
+  });
+});
diff --git a/frontend/package.json b/frontend/package.json
index 7729a94..b3ab206 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -8,7 +8,7 @@
     "build": "vite build",
     "lint": "eslint . --ext js,jsx --report-unused-disable-directives --max-warnings 0",
     "preview": "vite preview",
-    "test": "vitest",
+    "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
     "format": "cd .. && npm run format"
   },
   "dependencies": {
@@ -48,4 +48,4 @@
     "vite": "^4.4.5",
     "vitest": "^0.34.6"
   }
-}
+}
\ No newline at end of file
diff --git a/frontend/src/test/utils/avgRating.test.js b/frontend/src/test/utils/avgRating.test.js
new file mode 100644
index 0000000..22f79f6
--- /dev/null
+++ b/frontend/src/test/utils/avgRating.test.js
@@ -0,0 +1,23 @@
+import GetAvgRating from "../../utils/avgRating";
+
+describe("GetAvgRating", () => {
+  it("should return 0 when the array is empty", () => {
+    expect(GetAvgRating([])).toBe(0);
+  });
+
+  it("should correctly calculate the average rating", () => {
+    const ratings = [
+      { rating: 5 },
+      { rating: 4 },
+      { rating: 3 },
+      { rating: 2 },
+      { rating: 1 },
+    ];
+    expect(GetAvgRating(ratings)).toBe(3);
+  });
+
+  it("should correctly round the average rating to one decimal place", () => {
+    const ratings = [{ rating: 5 }, { rating: 4 }, { rating: 4 }];
+    expect(GetAvgRating(ratings)).toBe(4.3);
+  });
+});