diff --git a/playground/define/__tests__/define.spec.ts b/playground/define/__tests__/define.spec.ts
index 5d9707e70b47ba..3a4f34c5bbe7ff 100644
--- a/playground/define/__tests__/define.spec.ts
+++ b/playground/define/__tests__/define.spec.ts
@@ -1,7 +1,9 @@
 test('string', async () => {
   const defines = require('../vite.config.js').define
 
-  expect(await page.textContent('.exp')).toBe(String(eval(defines.__EXP__)))
+  expect(await page.textContent('.exp')).toBe(
+    String(typeof eval(defines.__EXP__))
+  )
   expect(await page.textContent('.string')).toBe(JSON.parse(defines.__STRING__))
   expect(await page.textContent('.number')).toBe(String(defines.__NUMBER__))
   expect(await page.textContent('.boolean')).toBe(String(defines.__BOOLEAN__))
diff --git a/playground/define/index.html b/playground/define/index.html
index c89a3fe02218ff..97a7b9902a1dcb 100644
--- a/playground/define/index.html
+++ b/playground/define/index.html
@@ -18,7 +18,7 @@ <h1>Define</h1>
 
 <script type="module">
   const __VAR_NAME__ = true // ensure define doesn't replace var name
-  text('.exp', __EXP__)
+  text('.exp', typeof __EXP__) // typeof __EXP__ would be `boolean` instead of `string`
   text('.string', __STRING__)
   text('.number', __NUMBER__)
   text('.boolean', __BOOLEAN__)
diff --git a/playground/define/vite.config.js b/playground/define/vite.config.js
index 88173fe654b58d..fb49d658f49e90 100644
--- a/playground/define/vite.config.js
+++ b/playground/define/vite.config.js
@@ -1,6 +1,6 @@
 module.exports = {
   define: {
-    __EXP__: '1 + 1',
+    __EXP__: 'false',
     __STRING__: '"hello"',
     __NUMBER__: 123,
     __BOOLEAN__: true,