diff --git a/rental_fees/tests/test_rental_fees_computation.py b/rental_fees/tests/test_rental_fees_computation.py
index 53f57683f..89d044048 100644
--- a/rental_fees/tests/test_rental_fees_computation.py
+++ b/rental_fees/tests/test_rental_fees_computation.py
@@ -326,16 +326,22 @@ def months_from_start(date):
             delta = relativedelta(date, start_date)
             return delta.years * 12 + delta.months
 
+        def fees_descr(details):
+            mfs = months_from_start  # just a short alias
+            aday = relativedelta(days=1)
+            return [(mfs(d.from_date), mfs(d.to_date + aday), d.fees) for d in details]
+
+        forecast_fees = computation.detail_ids.filtered("is_forecast")
+        actual_fees = computation.detail_ids - forecast_fees
+
         self.assertEqual(
-            [
-                (months_from_start(d.from_date), months_from_start(d.to_date))
-                for d in computation.detail_ids
-            ],
-            [(0, 2), (2, 3), (3, 5), (5, 39)],
+            fees_descr(actual_fees),
+            [(0, 1, 2.50), (1, 2, 2.50), (2, 3, 12.50), (3, 4, 12.50)],
         )
 
         self.assertEqual(
-            [d.fees for d in computation.detail_ids], [0.0, 0.0, 45.0, 52.5]
+            fees_descr(forecast_fees),
+            [],
         )
 
         self.assertEqual(