diff --git a/packages/playground/css/__tests__/css.spec.ts b/packages/playground/css/__tests__/css.spec.ts
index 6ca00e760349b1..9869bb34d2c690 100644
--- a/packages/playground/css/__tests__/css.spec.ts
+++ b/packages/playground/css/__tests__/css.spec.ts
@@ -15,7 +15,11 @@ import {
 // in later assertions to ensure CSS HMR doesn't reload the page
 test('imported css', async () => {
   const css = await page.textContent('.imported-css')
-  expect(css).toContain('.imported {')
+  expect(css).toMatch(/\.imported ?{/)
+  if (isBuild) {
+    expect(css.trim()).not.toContain('\n') // check minified
+  }
+
   const glob = await page.textContent('.imported-css-glob')
   expect(glob).toContain('.dir-import')
   const globEager = await page.textContent('.imported-css-globEager')
@@ -372,6 +376,10 @@ test('inlined-code', async () => {
   // should resolve assets
   expect(code).toContain('background:')
   expect(code).not.toContain('__VITE_ASSET__')
+
+  if (isBuild) {
+    expect(code.trim()).not.toContain('\n') // check minified
+  }
 })
 
 test('minify css', async () => {
diff --git a/packages/vite/src/node/plugins/css.ts b/packages/vite/src/node/plugins/css.ts
index 42adafd4b8791d..9ead17822d23a9 100644
--- a/packages/vite/src/node/plugins/css.ts
+++ b/packages/vite/src/node/plugins/css.ts
@@ -376,7 +376,7 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
           code = modulesCode
         } else {
           let content = css
-          if (inlined) {
+          if (config.build.minify) {
             content = await minifyCSS(content, config)
           }
           code = `export default ${JSON.stringify(content)}`