diff --git a/backend/src/graphql/resolver/UserResolver.test.ts b/backend/src/graphql/resolver/UserResolver.test.ts
index 367f82b4f..5be3c3e20 100644
--- a/backend/src/graphql/resolver/UserResolver.test.ts
+++ b/backend/src/graphql/resolver/UserResolver.test.ts
@@ -176,7 +176,7 @@ describe('UserResolver', () => {
         expect(EventProtocol.find()).resolves.toContainEqual(
           expect.objectContaining({
             type: EventProtocolType.SEND_CONFIRMATION_EMAIL,
-            userId: expect.any(Number), // as it is randomly generated
+            userId: user.id,
           }),
         )
       })