diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..619431a
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,27 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch: ~
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js and Bun
+        uses: oven-sh/setup-bun@v2
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Run tests
+        run: bun run test
diff --git a/.gitignore b/.gitignore
index 42d43cc..5c8c55e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /.idea
 /node_modules
 /build
+/coverage
diff --git a/README.md b/README.md
index f322d1b..0949753 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Template Node
 
 [![Build Workflow](https://github.com/jdevelop-io/template-node/actions/workflows/build.yml/badge.svg)](https://github.com/jdevelop-io/template-node/actions/workflows/build.yml)
+[![Tests Workflow](https://github.com/jdevelop-io/template-node/actions/workflows/tests.yml/badge.svg)](https://github.com/jdevelop-io/template-node/actions/workflows/tests.yml)
 [![License](https://img.shields.io/github/license/jdevelop-io/template-node)](/LICENSE)
 [![WakaTime](https://wakatime.com/badge/user/b5dd94a4-c0ea-4c12-9cb2-41f984e74fdc/project/e774c158-4cbd-4a4e-a265-1c08e6e84c3d.svg)](https://wakatime.com/badge/user/b5dd94a4-c0ea-4c12-9cb2-41f984e74fdc/project/e774c158-4cbd-4a4e-a265-1c08e6e84c3d)
 
diff --git a/bun.lockb b/bun.lockb
index b22a0a9..39da5ae 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/jest.config.ts b/jest.config.ts
new file mode 100644
index 0000000..f95b01e
--- /dev/null
+++ b/jest.config.ts
@@ -0,0 +1,54 @@
+/**
+ * For a detailed explanation regarding each configuration property, visit:
+ * https://jestjs.io/docs/configuration
+ */
+
+import type { Config } from 'jest'
+
+const config: Config = {
+  preset: 'ts-jest',
+
+  // Automatically clear mock calls, instances, contexts and results before every test
+  clearMocks: true,
+
+  // Indicates whether the coverage information should be collected while executing the test
+  collectCoverage: false,
+
+  // The directory where Jest should output its coverage files
+  coverageDirectory: 'coverage',
+
+  // An array of glob patterns indicating a set of files for which coverage information should be collected
+  collectCoverageFrom: ['**/*.ts', '!jest.config.ts'],
+
+  // An array of regexp pattern strings used to skip coverage collection
+  coveragePathIgnorePatterns: ['/node_modules/', '/coverage/', '/dist/'],
+
+  // Indicates which provider should be used to instrument code for coverage
+  coverageProvider: 'babel',
+
+  // A list of reporter names that Jest uses when writing coverage reports
+  coverageReporters: ['json', 'text', 'lcov', 'clover'],
+
+  // An object that configures minimum threshold enforcement for coverage results
+  coverageThreshold: {
+    global: {
+      branches: 100,
+      functions: 100,
+      lines: 100,
+      statements: 100,
+    },
+  },
+
+  // Make calling deprecated APIs throw helpful error messages
+  errorOnDeprecated: true,
+
+  // An array of directory names to be searched recursively up from the requiring module's location
+  moduleDirectories: ['node_modules'],
+
+  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1',
+  },
+}
+
+export default config
diff --git a/package.json b/package.json
index c07a99a..9b89991 100644
--- a/package.json
+++ b/package.json
@@ -15,11 +15,19 @@
   "main": "src/add.ts",
   "scripts": {
     "prebuild": "rimraf build",
-    "build": "bun build src/add.ts --outdir ./build"
+    "build": "bun build src/add.ts --outdir ./build",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage",
+    "test:coverage:watch": "jest --coverage --watch"
   },
   "devDependencies": {
     "@types/bun": "^1.1.6",
+    "@types/jest": "^29.5.12",
+    "jest": "^29.7.0",
     "rimraf": "^6.0.1",
+    "ts-jest": "^29.2.4",
+    "ts-node": "^10.9.2",
     "typescript": "^5.5.4"
   }
 }
diff --git a/src/add.test.ts b/src/add.test.ts
new file mode 100644
index 0000000..e298e31
--- /dev/null
+++ b/src/add.test.ts
@@ -0,0 +1,7 @@
+import { add } from '@/add.ts'
+
+describe('add', () => {
+  it('should add two numbers', () => {
+    expect(add(1, 2)).toBe(3)
+  })
+})
diff --git a/tsconfig.json b/tsconfig.json
index 4d4bc96..2e0b2e9 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -14,7 +14,7 @@
     "moduleDetection": "force",
     "moduleResolution": "bundler",
     "allowImportingTsExtensions": true,
-    "verbatimModuleSyntax": true,
+    "esModuleInterop": true,
     "noEmit": true,
     "strict": true,
     "skipLibCheck": true,