diff --git a/packages/backend-common/src/service/lib/ServiceBuilderImpl.test.ts b/packages/backend-common/src/service/lib/ServiceBuilderImpl.test.ts
index 10363f9d1b..853c7d9a9e 100644
--- a/packages/backend-common/src/service/lib/ServiceBuilderImpl.test.ts
+++ b/packages/backend-common/src/service/lib/ServiceBuilderImpl.test.ts
@@ -40,21 +40,17 @@ describe('ServiceBuilderImpl', () => {
       const serviceBuilder = new ServiceBuilderImpl(module);
       const customErrorHandler = (
         error: Error,
-        // @ts-ignore
-        req: Request,
-        // @ts-ignore
-        res: Response,
+        _req: Request,
+        _res: Response,
         next: NextFunction,
       ) => {
         next(error);
       };
       serviceBuilder.setErrorHandler(customErrorHandler);
-      // @ts-ignore check private attribute
       expect(serviceBuilder.errorHandler).toEqual(customErrorHandler);
     });
     it('use default error handler', () => {
       const serviceBuilder = new ServiceBuilderImpl(module);
-      // @ts-ignore check private attribute
       expect(serviceBuilder.errorHandler).toBeUndefined();
     });
   });