diff --git a/server/test/vitest.config.mjs b/server/test/vitest.config.mjs
index 6d9ee3a564..79d053d176 100644
--- a/server/test/vitest.config.mjs
+++ b/server/test/vitest.config.mjs
@@ -2,9 +2,6 @@ import swc from 'unplugin-swc';
 import tsconfigPaths from 'vite-tsconfig-paths';
 import { defineConfig } from 'vitest/config';
 
-// Set the timezone to UTC to avoid timezone issues during testing
-process.env.TZ = 'UTC';
-
 export default defineConfig({
   test: {
     root: './',
@@ -25,6 +22,9 @@ export default defineConfig({
         fallbackCJS: true,
       },
     },
+    env: {
+      TZ: 'UTC',
+    },
   },
   plugins: [swc.vite(), tsconfigPaths()],
 });
diff --git a/web/vite.config.ts b/web/vite.config.ts
index 6a2f34cf55..69e1d7152f 100644
--- a/web/vite.config.ts
+++ b/web/vite.config.ts
@@ -63,5 +63,8 @@ export default defineConfig({
     sequence: {
       hooks: 'list',
     },
+    env: {
+      TZ: 'UTC',
+    },
   },
 } as UserConfig);