diff --git a/frontend/package.json b/frontend/package.json
index 649eefb..bd35f2f 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -10,7 +10,7 @@
     "lint": "eslint --ext .js,.vue --ignore-path .gitignore --fix src",
     "lint-no-fix": "eslint --ext .js,.vue --ignore-path .gitignore src",
     "format": "prettier .  --write",
-    "test": "vitest"
+    "test": "vitest --config vitest.config.ts"
   },
   "dependencies": {
     "@fullcalendar/core": "^6.1.13",
diff --git a/frontend/vitest.config.ts b/frontend/vitest.config.ts
new file mode 100644
index 0000000..5f06fdd
--- /dev/null
+++ b/frontend/vitest.config.ts
@@ -0,0 +1,11 @@
+// vitest.config.ts
+import {mergeConfig} from 'vite'
+import {defineConfig} from 'vitest/config'
+import viteConfig from './vite.config'
+
+export default mergeConfig(viteConfig, defineConfig({
+  test: {
+    globals: true,
+    globalSetup: './vitest.global-setup.ts',
+  },
+}))
\ No newline at end of file
diff --git a/frontend/vitest.global-setup.ts b/frontend/vitest.global-setup.ts
new file mode 100644
index 0000000..f7ffa41
--- /dev/null
+++ b/frontend/vitest.global-setup.ts
@@ -0,0 +1,3 @@
+export const setup = () => {
+  process.env.TZ = 'UTC'
+}
\ No newline at end of file