diff --git a/l10n_it_account/tests/test_l10n_it_account.py b/l10n_it_account/tests/test_l10n_it_account.py
index d1b94d4c1d3..5982f5c44d3 100644
--- a/l10n_it_account/tests/test_l10n_it_account.py
+++ b/l10n_it_account/tests/test_l10n_it_account.py
@@ -199,3 +199,12 @@ def test_partially_deductible_balance_recomputation(self):
 
         # Check tomorrow's balance
         self.check_date_balance(self.iva_22I5, tomorrow, -22, -22)
+
+    def check_date_balance(self, tax, date, deductible, not_deductible):
+        """Compare expected balances with tax's balance in specified date."""
+        tax = tax.with_context(
+            from_date=date,
+            to_date=date,
+        )
+        self.assertEqual(tax.deductible_balance, deductible)
+        self.assertEqual(tax.undeductible_balance, not_deductible)