diff --git a/packages/core/src/cli/commands/build.test.ts b/packages/core/src/cli/commands/build.test.ts
new file mode 100644
index 0000000..fdc9d93
--- /dev/null
+++ b/packages/core/src/cli/commands/build.test.ts
@@ -0,0 +1,45 @@
+import type { ParsedArgs } from 'citty'
+import consola from 'consola'
+import { expect, it, vi } from 'vitest'
+import { exportedForTest } from './build.js'
+
+const build = exportedForTest.build
+
+const mocks = vi.hoisted(() => {
+  return {
+    build: vi.fn(),
+  }
+})
+
+vi.mock('nitropack', () => {
+  return {
+    build: mocks.build,
+  }
+})
+
+it('start build with message', () => {
+  const message = 'Building project...'
+  const spy = vi.spyOn(consola, 'start')
+
+  build({ dir: 'fakeDir', _: [] } as ParsedArgs)
+
+  expect(spy).toHaveBeenCalledWith(message)
+})
+
+// test('execute nitropack build', () => {
+//   mocks.build.mockImplementation(() => {})
+//   testFn({ dir: '.' })
+
+//   expect(mocks.build).toHaveBeenCalled()
+// })
+
+// test('catch error', () => {
+//   const spy = vi.spyOn(consola, 'error')
+//   mocks.build.mockImplementationOnce(() => {
+//     throw new Error('hey')
+//   })
+
+//   testFn()
+
+//   expect(spy).toHaveBeenCalledWith(new Error('hey'))
+// })
diff --git a/packages/core/src/cli/commands/build.ts b/packages/core/src/cli/commands/build.ts
index 73746d1..e088e73 100644
--- a/packages/core/src/cli/commands/build.ts
+++ b/packages/core/src/cli/commands/build.ts
@@ -20,7 +20,7 @@ async function _build(args: ParsedArgs) {
     const dir: string = args.dir?.toString() || args._dir?.toString() || '.'
     const rootDir = resolve(dir)
 
-    const [mcflyConfig, appConfigFile] = await getMcFlyConfig()
+    const { mcflyConfig, configFile } = await getMcFlyConfig()
     const nitroConfig = await getNitroConfig(mcflyConfig)
 
     const nitro = await createNitro({
@@ -41,7 +41,7 @@ async function _build(args: ParsedArgs) {
       handler: resolve(__dirname, '../../route-middleware.js'),
     })
 
-    nitro.options.runtimeConfig.appConfigFile = appConfigFile
+    nitro.options.runtimeConfig.appConfigFile = configFile
 
     await prepare(nitro)
     await copyPublicAssets(nitro)
diff --git a/packages/core/src/cli/commands/generate.test.ts b/packages/core/src/cli/commands/generate.test.ts
new file mode 100644
index 0000000..ef77d66
--- /dev/null
+++ b/packages/core/src/cli/commands/generate.test.ts
@@ -0,0 +1,15 @@
+import { expect, it, vi } from 'vitest'
+import { exportedForTest } from './generate.js'
+import consola from 'consola'
+
+const generate = exportedForTest.generate
+
+it('show box message in-progress', () => {
+  const spy = vi.spyOn(consola, 'box')
+
+  generate()
+  const arg = spy.mock.calls[0][0]
+
+  expect(spy).toHaveBeenCalled()
+  expect(arg).toContain('In-progress')
+})
diff --git a/packages/core/src/cli/commands/new.test.ts b/packages/core/src/cli/commands/new.test.ts
new file mode 100644
index 0000000..cd5db22
--- /dev/null
+++ b/packages/core/src/cli/commands/new.test.ts
@@ -0,0 +1,80 @@
+import { execSync } from 'node:child_process'
+import { consola } from 'consola'
+import { expect, vi } from 'vitest'
+import { exportedForTest } from './new.js'
+import { it } from 'node:test'
+
+const createNew = exportedForTest.createNew
+const baseCommand = `npm create mcfly@latest`
+
+const mocks = vi.hoisted(() => {
+  return {
+    execSync: vi.fn(),
+  }
+})
+
+vi.mock('node:child_process', () => {
+  return {
+    execSync: mocks.execSync,
+  }
+})
+
+it('execute create mcfly', () => {
+  const param = { stdio: 'inherit' }
+
+  createNew({ _: [] })
+
+  expect(execSync).toHaveBeenCalledWith(baseCommand, param)
+})
+
+it('execute create mcfly with no dir', () => {
+  const dir = 'fake-dir'
+  const command = `${baseCommand} ${dir}`
+  const param = { stdio: 'inherit' }
+
+  createNew({ _: [] })
+
+  expect(execSync).not.toHaveBeenCalledWith(command, param)
+})
+
+it('execute create mcfly with dir', () => {
+  const dir = 'fake-dir'
+  const command = `${baseCommand} ${dir}`
+  const param = { stdio: 'inherit' }
+
+  createNew({ dir, _: [] })
+
+  expect(execSync).toHaveBeenCalledWith(command, param)
+})
+
+it('execute create mcfly with _dir', () => {
+  const dir = 'fake-dir'
+  const command = `${baseCommand} ${dir}`
+  const param = { stdio: 'inherit' }
+
+  createNew({ _dir: dir, _: [] })
+
+  expect(execSync).toHaveBeenCalledWith(command, param)
+})
+
+it('execute create mcfly with dir preferred over _dir', () => {
+  const dir = 'preferred-dir'
+  const command = `${baseCommand} ${dir}`
+  const param = { stdio: 'inherit' }
+
+  createNew({ dir, _dir: 'not-preferred', _: [] })
+
+  expect(execSync).toHaveBeenCalledWith(command, param)
+})
+
+it('catch error', () => {
+  const dir = 'fake-dir'
+  const spy = vi.spyOn(consola, 'error')
+  mocks.execSync.mockImplementationOnce(() => {
+    throw new Error('hey')
+  })
+
+  createNew({ dir, _: [] })
+
+  expect(spy).toHaveBeenCalledWith(new Error('hey'))
+})
diff --git a/packages/core/src/cli/commands/prepare.ts b/packages/core/src/cli/commands/prepare.ts
index f2763da..7ec9558 100755
--- a/packages/core/src/cli/commands/prepare.ts
+++ b/packages/core/src/cli/commands/prepare.ts
@@ -15,7 +15,7 @@ async function prepare(args: ParsedArgs) {
     // TODO: check for dir type (should be string)
     const dir: string = args.dir?.toString() || args._dir?.toString() || '.'
     const rootDir = resolve(dir)
-    const [mcflyConfig] = await getMcFlyConfig()
+    const { mcflyConfig } = await getMcFlyConfig()
     const nitroConfig = await getNitroConfig(mcflyConfig)
     const nitro = await createNitro({ rootDir, ...nitroConfig })
 
diff --git a/packages/core/src/cli/commands/serve.test.ts b/packages/core/src/cli/commands/serve.test.ts
new file mode 100644
index 0000000..bc70d91
--- /dev/null
+++ b/packages/core/src/cli/commands/serve.test.ts
@@ -0,0 +1,74 @@
+import consola from 'consola'
+import { describe, expect, it, vi } from 'vitest'
+import { exportedForTest } from './serve.js'
+
+// describe.skip('FUNCTION: serve()', () => {
+//   // // const testFn = exportedForTest.serve
+//   // const mocks = vi.hoisted(() => {
+//   //   return {
+//   //     execSync: vi.fn(),
+//   //   }
+//   // })
+//   // vi.mock('node:child_process', () => {
+//   //   return {
+//   //     execSync: mocks.execSync,
+//   //   }
+//   // })
+//   // test('execute nitropack serve', async () => {
+//   //   const command = `npx nitropack dev`
+//   //   const param = { stdio: 'inherit' }
+//   //   testFn()
+//   //   expect(mocks.execSync).toHaveBeenCalledWith(command, param)
+//   // })
+//   // test('catch error', () => {
+//   //   const spy = vi.spyOn(consola, 'error')
+//   //   mocks.execSync.mockImplementationOnce(() => {
+//   //     throw new Error('hey')
+//   //   })
+//   //   testFn()
+//   //   expect(spy).toHaveBeenCalledWith(new Error('hey'))
+//   // })
+// })
+
+describe('fUNCTION: printInfo()', () => {
+  const testFn = exportedForTest.printInfo
+
+  const createRequireMocks = vi.hoisted(() => {
+    return {
+      createRequire: vi.fn(),
+    }
+  })
+
+  vi.mock('node:module', () => {
+    return {
+      createRequire: createRequireMocks.createRequire,
+    }
+  })
+
+  it('log mcfly and nitro versions', async () => {
+    const spy = vi.spyOn(consola, 'log')
+    createRequireMocks.createRequire.mockImplementationOnce(() => {
+      return () => {
+        return {
+          version: '-1.0.0',
+        }
+      }
+    })
+
+    await testFn()
+
+    expect(spy.mock.calls[0][0]).toContain('McFly')
+    expect(spy.mock.calls[0][0]).toContain('Nitro')
+  })
+
+  it('catch error', async () => {
+    createRequireMocks.createRequire.mockImplementationOnce(() => {
+      throw new Error('error')
+    })
+    const spy = vi.spyOn(consola, 'error')
+
+    await testFn()
+
+    expect(spy).toHaveBeenCalledWith(new Error('error'))
+  })
+})
diff --git a/packages/core/src/cli/commands/serve.ts b/packages/core/src/cli/commands/serve.ts
index 3aaced4..9f4d8d0 100644
--- a/packages/core/src/cli/commands/serve.ts
+++ b/packages/core/src/cli/commands/serve.ts
@@ -53,7 +53,7 @@ async function serve(args: ParsedArgs) {
         await nitro.close()
       }
 
-      const [mcflyConfig, appConfigFile] = await getMcFlyConfig()
+      const { mcflyConfig, configFile } = await getMcFlyConfig()
       const nitroConfig = await getNitroConfig(mcflyConfig)
 
       // create new nitro
@@ -92,7 +92,7 @@ async function serve(args: ParsedArgs) {
         }
       )
       nitro.hooks.hookOnce('restart', reload)
-      nitro.options.runtimeConfig.appConfigFile = appConfigFile
+      nitro.options.runtimeConfig.appConfigFile = configFile
 
       nitro.options.handlers.push({
         middleware: true,
diff --git a/packages/core/src/get-config.js b/packages/core/src/get-config.js
index 624b7bf..28fc84a 100644
--- a/packages/core/src/get-config.js
+++ b/packages/core/src/get-config.js
@@ -28,5 +28,5 @@ export async function getMcFlyConfig() {
     name: 'mcfly',
   })
 
-  return [mcflyConfig, configFile]
+  return { mcflyConfig, configFile }
 }