diff --git a/test/setup.js b/test/setup.js
index da0b85ac..cd33b518 100644
--- a/test/setup.js
+++ b/test/setup.js
@@ -1,6 +1,8 @@
 // mock
 jest.mock('tailchat-shared/i18n');
 
+process.env.TZ = 'Asia/Shanghai';
+
 const ignoreErroMessages = [
   /Warning.*not wrapped in act/,
   /PluginManifest validation/,