diff --git a/src/components/dialog/__tests__/SiteUserDataDialog.spec.ts b/src/components/dialog/__tests__/SiteUserDataDialog.spec.ts
index be6c720d..f810e854 100644
--- a/src/components/dialog/__tests__/SiteUserDataDialog.spec.ts
+++ b/src/components/dialog/__tests__/SiteUserDataDialog.spec.ts
@@ -1,5 +1,6 @@
 import SiteUserDataDialog from '@/components/dialog/SiteUserDataDialog.vue'
 import type { SiteUserData } from '@/api/types'
+import vuetify from '@/plugins/vuetify'
 import { fireEvent, screen, waitFor } from '@testing-library/vue'
 import { createSite, createSiteUserData } from '@tests/support/factories/site'
 import { refreshSiteUserDataHandler, siteUserDataHandler } from '@tests/support/msw/handlers/site'
@@ -97,6 +98,8 @@ function getRetryButton() {
 describe('SiteUserDataDialog projections', () => {
   beforeEach(() => {
     chartInputs.length = 0
+    // 图表明暗断言基于浅色环境，显式固定主题避免受应用默认主题影响。
+    vuetify.theme.global.name.value = 'light'
     vi.spyOn(console, 'error').mockImplementation(() => {})
     vi.spyOn(console, 'log').mockImplementation(() => {})
   })
diff --git a/src/views/setting/__tests__/AccountSettingNotification.spec.ts b/src/views/setting/__tests__/AccountSettingNotification.spec.ts
index 5436b9b9..9dfe7881 100644
--- a/src/views/setting/__tests__/AccountSettingNotification.spec.ts
+++ b/src/views/setting/__tests__/AccountSettingNotification.spec.ts
@@ -232,6 +232,8 @@ describe('AccountSettingNotification', () => {
 
   it('loads, edits, and saves a template while pausing refresh and following the active theme', async () => {
     const previousTheme = vuetify.theme.global.name.value
+    // 从浅色主题起步验证编辑器跟随主题切换，不受应用默认主题影响。
+    vuetify.theme.global.name.value = 'light'
     const controller = createDialogController()
     mocks.openSharedDialog.mockReturnValue(controller)