diff --git a/src/platform/updates/components/ReleaseNotificationToast.test.ts b/src/platform/updates/components/ReleaseNotificationToast.test.ts
index 17373adb4..021772ae2 100644
--- a/src/platform/updates/components/ReleaseNotificationToast.test.ts
+++ b/src/platform/updates/components/ReleaseNotificationToast.test.ts
@@ -20,6 +20,11 @@ vi.mock('vue-i18n', () => ({
       }
       return translations[key] || key
     })
+  })),
+  createI18n: vi.fn(() => ({
+    global: {
+      locale: { value: 'en' }
+    }
   }))
 }))
 
diff --git a/src/platform/updates/components/WhatsNewPopup.test.ts b/src/platform/updates/components/WhatsNewPopup.test.ts
index e2ed7fa85..4d2f7ee90 100644
--- a/src/platform/updates/components/WhatsNewPopup.test.ts
+++ b/src/platform/updates/components/WhatsNewPopup.test.ts
@@ -16,6 +16,13 @@ const mockTranslations: Record<string, string> = {
 }
 
 vi.mock('@/i18n', () => ({
+  i18n: {
+    global: {
+      locale: {
+        value: 'en'
+      }
+    }
+  },
   t: (key: string, params?: Record<string, string>) => {
     return params
       ? `${mockTranslations[key] || key}:${JSON.stringify(params)}`