diff --git a/src/init.js b/src/init.js
index 94e973f4..a93eded7 100644
--- a/src/init.js
+++ b/src/init.js
@@ -29,7 +29,13 @@ class Init {
     const packageInfo = JSON.parse(await this.readFile('package.json'))
 
     // update 'scripts'
+    if (!('scripts' in packageInfo)) {
+      packageInfo.scripts = {}
+    }
     const { scripts } = packageInfo
+    if (!('test' in scripts)) {
+      scripts.test = 'test'
+    }
     Object.assign(scripts, {
       'test:watch': `${scripts.test} --watch`,
       'test:coverage': 'echo "unsupported." && exit 1',
diff --git a/test/init.test.js b/test/init.test.js
index 027ab53b..753cbd51 100644
--- a/test/init.test.js
+++ b/test/init.test.js
@@ -31,7 +31,7 @@ suite('init', () => {
     await fs.remove(workDir)
   })
 
-  test('write package.json', async () => {
+  test('update package.json', async () => {
     await exec('init')
     const pkg = await fs.readJson(packageJson)
 
@@ -66,6 +66,16 @@ suite('init', () => {
     })
   })
 
+  test('update package.json without fields', async () => {
+    await fs.writeJson(packageJson, {})
+    await exec('init')
+    const pkg = await fs.readJson(packageJson)
+    assert('scripts' in pkg)
+    assert('test' in pkg.scripts)
+    assert('lint-staged' in pkg)
+    assert('standard-version' in pkg)
+  })
+
   test('copy .editorconfig', async () => {
     await exec('init')