diff --git a/packages/backend/package.json b/packages/backend/package.json
index 8fea771eaf..0503d58bb3 100644
--- a/packages/backend/package.json
+++ b/packages/backend/package.json
@@ -209,6 +209,7 @@
 		"@types/ws": "8.18.1",
 		"@typescript-eslint/eslint-plugin": "8.48.0",
 		"@typescript-eslint/parser": "8.48.0",
+		"@vitest/coverage-v8": "4.0.13",
 		"aws-sdk-client-mock": "4.1.0",
 		"cbor": "10.0.11",
 		"cross-env": "10.1.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 09bb76c53c..05a2f1edd4 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -514,6 +514,9 @@ importers:
       '@typescript-eslint/parser':
         specifier: 8.48.0
         version: 8.48.0(eslint@9.39.1)(typescript@5.9.3)
+      '@vitest/coverage-v8':
+        specifier: 4.0.13
+        version: 4.0.13(vitest@4.0.13(@opentelemetry/api@1.9.0)(@types/debug@4.1.12)(@types/node@24.10.1)(happy-dom@20.0.11)(jsdom@27.2.0(bufferutil@4.0.9)(utf-8-validate@6.0.5))(msw@2.12.3(@types/node@24.10.1)(typescript@5.9.3))(sass@1.94.2)(terser@5.44.1)(tsx@4.20.6))
       aws-sdk-client-mock:
         specifier: 4.1.0
         version: 4.1.0