diff --git a/frontend/src/types/test-shims.d.ts b/frontend/src/types/test-shims.d.ts
index 8a2cc62c..6f217520 100644
--- a/frontend/src/types/test-shims.d.ts
+++ b/frontend/src/types/test-shims.d.ts
@@ -1,4 +1,8 @@
 // Test-only type shims to satisfy strict type-checking in CI
+
+// Import jest-dom matchers for vitest
+/// <reference types="@testing-library/jest-dom/vitest" />
+
 // Properly type the default export from @testing-library/user-event
 declare module '@testing-library/user-event' {
   import type { UserEvent } from '@testing-library/user-event/dist/types/setup/setup'