diff --git a/mis_builder/tests/test_aep.py b/mis_builder/tests/test_aep.py
index 4eda20cfa..8802b4c4f 100644
--- a/mis_builder/tests/test_aep.py
+++ b/mis_builder/tests/test_aep.py
@@ -70,6 +70,7 @@ def setUp(self):
             amount=300,
             debit_acc=self.account_ar,
             credit_acc=self.account_in,
+            credit_quantity=3,
         )
         # create move in March this year
         self._create_move(
@@ -95,6 +96,7 @@ def setUp(self):
         self.aep.parse_expr("crdp[700I%]")
         self.aep.parse_expr("bali[400%]")
         self.aep.parse_expr("bale[700%]")
+        self.aep.parse_expr("fldp.quantity[700%]")
         self.aep.parse_expr("balp[]" "[('account_id.code', '=', '400AR')]")
         self.aep.parse_expr(
             "balp[]" "[('account_id.account_type', '=', " " 'asset_receivable')]"
@@ -109,17 +111,32 @@ def setUp(self):
         self.aep.parse_expr("bal_700IN")  # deprecated
         self.aep.parse_expr("bals[700IN]")  # deprecated
 
-    def _create_move(self, date, amount, debit_acc, credit_acc, post=True):
+    def _create_move(
+        self, date, amount, debit_acc, credit_acc, post=True, credit_quantity=0
+    ):
         move = self.move_model.create(
             {
                 "journal_id": self.journal.id,
                 "date": fields.Date.to_string(date),
                 "line_ids": [
-                    (0, 0, {"name": "/", "debit": amount, "account_id": debit_acc.id}),
                     (
                         0,
                         0,
-                        {"name": "/", "credit": amount, "account_id": credit_acc.id},
+                        {
+                            "name": "/",
+                            "debit": amount,
+                            "account_id": debit_acc.id,
+                        },
+                    ),
+                    (
+                        0,
+                        0,
+                        {
+                            "name": "/",
+                            "credit": amount,
+                            "account_id": credit_acc.id,
+                            "quantity": credit_quantity,
+                        },
                     ),
                 ],
             }
@@ -149,6 +166,20 @@ def test_sanity_check(self):
         self.assertEqual(self.company.fiscalyear_last_day, 31)
         self.assertEqual(self.company.fiscalyear_last_month, "12")
 
+    def test_parse_expr_error_handling(self):
+        aep = AEP(self.company)
+        with self.assertRaises(UserError) as cm:
+            aep.parse_expr("fldi.quantity[700%]")
+        self.assertIn(
+            "`fld` can only be used with mode `p` (variation)", str(cm.exception)
+        )
+        with self.assertRaises(UserError) as cm:
+            aep.parse_expr("fldp[700%]")
+        self.assertIn("`fld` must have a field name", str(cm.exception))
+        with self.assertRaises(UserError) as cm:
+            aep.parse_expr("balp.quantity[700%]")
+        self.assertIn("`bal` cannot have a field name", str(cm.exception))
+
     def test_aep_basic(self):
         self.aep.done_parsing()
         # let's query for december
@@ -200,6 +231,8 @@ def test_aep_basic(self):
         self.assertEqual(self._eval("bale[700IN]"), -300)
         # check result for non existing account
         self.assertIs(self._eval("bale[700NA]"), AccountingNone)
+        # check fldp.quantity
+        self.assertEqual(self._eval("fldp.quantity[700%]"), 3)
 
         # let's query for March
         self._do_queries(
@@ -231,6 +264,8 @@ def test_aep_basic(self):
         self.assertEqual(self._eval("debp[400A%]"), 500)
         self.assertEqual(self._eval("bal_700IN"), -500)
         self.assertEqual(self._eval("bals[700IN]"), -800)
+        # check fldp.quantity
+        self.assertEqual(self._eval("fldp.quantity[700%]"), 0)
 
         # unallocated p&l from previous year
         self.assertEqual(self._eval("balu[]"), -100)