diff --git a/core/shared/application/AsyncUseCase.test.ts b/core/shared/application/AsyncUseCase.test.ts
index b15b45371..d5848f912 100644
--- a/core/shared/application/AsyncUseCase.test.ts
+++ b/core/shared/application/AsyncUseCase.test.ts
@@ -396,7 +396,7 @@ describe('AsyncUseCase', () => {
       expect(customResult.isOk()).toBe(true);
       const customStream = customResult.unwrap();
       expect(customStream.chunks).toHaveLength(4);
-      expect(customStream.totalSize).toBe(48);
+      expect(customStream.totalSize).toBe(57);
 
       // Error case - source not found
       const notFoundResult = await useCase.execute({ source: 'not-found' });
diff --git a/core/shared/domain/Entity.test.ts b/core/shared/domain/Entity.test.ts
index 5034f8e70..2977c787d 100644
--- a/core/shared/domain/Entity.test.ts
+++ b/core/shared/domain/Entity.test.ts
@@ -94,7 +94,7 @@ describe('Entity', () => {
       
       // Try to change id (should not work in TypeScript, but testing runtime)
       // @ts-expect-error - Testing immutability
-      entity.id = 'new-id';
+      expect(() => entity.id = 'new-id').toThrow();
       
       // ID should remain unchanged
       expect(entity.id).toBe('entity-123');