diff --git a/sale_order_invoice_amount/models/sale_order.py b/sale_order_invoice_amount/models/sale_order.py
index e4e3d09e18c..9923c7a5812 100644
--- a/sale_order_invoice_amount/models/sale_order.py
+++ b/sale_order_invoice_amount/models/sale_order.py
@@ -37,7 +37,7 @@ def _compute_invoice_amount(self):
                             and rec.currency_id != invoice.company_currency_id
                         ):
                             rec.invoiced_amount += invoice.currency_id._convert(
-                                invoice.amount_total_signed,
+                                invoice.amount_total_in_currency_signed,
                                 rec.currency_id,
                                 invoice.company_id,
                                 invoice.invoice_date or fields.Date.today(),
diff --git a/sale_order_invoice_amount/tests/test_sale_order_invoice_amount.py b/sale_order_invoice_amount/tests/test_sale_order_invoice_amount.py
index 08a7a4c6246..7add45add7d 100644
--- a/sale_order_invoice_amount/tests/test_sale_order_invoice_amount.py
+++ b/sale_order_invoice_amount/tests/test_sale_order_invoice_amount.py
@@ -196,10 +196,10 @@ def test_02_sale_order_invoiced_amount_different_currencies_invoice(self):
             }
         )
         test_invoice.action_post()
-        self.assertAlmostEqual(
+        self.assertEqual(
             self.sale_order_1.invoiced_amount,
-            242.0,
-            delta=1,
+            242.11,
+            "Invoiced Amount should be 242.11.",
         )
         self.assertEqual(
             self.sale_order_1.uninvoiced_amount,
@@ -311,10 +311,10 @@ def test_03_sale_order_invoiced_amount_different_currencies_sale(self):
             }
         )
         test_invoice.action_post()
-        self.assertAlmostEqual(
+        self.assertEqual(
             self.sale_order_1.invoiced_amount,
-            242.0,
-            delta=40,
+            242.13,
+            "Invoiced Amount should be 242.13.",
         )
         self.assertEqual(
             self.sale_order_1.uninvoiced_amount,
@@ -387,10 +387,10 @@ def test_03_sale_order_invoiced_amount_different_currencies_sale(self):
             ]
         )
         test_invoice.action_post()
-        self.assertAlmostEqual(
+        self.assertEqual(
             self.sale_order_1.invoiced_amount,
-            363.0,
-            delta=100,
+            363.06,
+            "Invoiced Amount should be 363.06.",
         )
         self.assertEqual(
             self.sale_order_1.uninvoiced_amount,