diff --git a/packages/plugin/vite.config.js b/packages/plugin/vite.config.js
index de25e6790..a89fee052 100644
--- a/packages/plugin/vite.config.js
+++ b/packages/plugin/vite.config.js
@@ -23,6 +23,8 @@ export default defineConfig({
   ],
   test: {
     environment: 'node',
+    // 実ビルドを伴うテストが多く、CI（4 vCPU）では既定の5秒を超えることがある
+    testTimeout: 15000,
     typecheck: {
       enabled: true,
       exclude: ['**/node_modules/**', '**/.git/**'],