diff --git a/src/test-writing-style.md b/src/test-writing-style.md
index 07c9535..d194a93 100644
--- a/src/test-writing-style.md
+++ b/src/test-writing-style.md
@@ -13,7 +13,7 @@
 ```js
 test("正しくJSONをパースできる", () => {
   // 準備
-  const json = `{"name": "太郎", "age": 20}`;
+  const json = `{ "name": "太郎", "age": 20 }`;
 
   // 実行
   const parsed = JSON.parse(json);