diff --git a/backend/src/modules/trips/settle-fare.spec.ts b/backend/src/modules/trips/settle-fare.spec.ts
index 299ee39..eb395a5 100644
--- a/backend/src/modules/trips/settle-fare.spec.ts
+++ b/backend/src/modules/trips/settle-fare.spec.ts
@@ -57,6 +57,8 @@ function build(opts: {
     coupons,
     {} as any, // referrals
     distances,
+    {} as any, // surge
+    {} as any, // tierCalc
   );
   // `tariffDef` يقرأ التعرفة الفعّالة — نثبّتها لأن المقصود هنا حساب المال.
   (svc as any).tariffDef = jest.fn().mockResolvedValue(opts.def ?? DEF);