diff --git a/rma_purchase/tests/test_rma_stock_account_purchase.py b/rma_purchase/tests/test_rma_stock_account_purchase.py
index 2bb25bf1..fe7d21d3 100644
--- a/rma_purchase/tests/test_rma_stock_account_purchase.py
+++ b/rma_purchase/tests/test_rma_stock_account_purchase.py
@@ -14,40 +14,40 @@ class TestRmaStockAccountPurchase(TestRmaStockAccount):
         super(TestRmaStockAccountPurchase, cls).setUpClass()
         cls.pol_model = cls.env["purchase.order.line"]
         cls.po_model = cls.env["purchase.order"]
-        # Create PO:
-        cls.product_fifo_1.standard_price = 1234
-        cls.po = cls.po_model.create(
-            {
-                "partner_id": cls.partner_id.id,
-            }
-        )
-        cls.pol_1 = cls.pol_model.create(
-            {
-                "name": cls.product_fifo_1.name,
-                "order_id": cls.po.id,
-                "product_id": cls.product_fifo_1.id,
-                "product_qty": 20.0,
-                "product_uom": cls.product_fifo_1.uom_id.id,
-                "price_unit": 100.0,
-                "date_planned": Datetime.now(),
-            }
-        )
-        cls.po.button_confirm()
-        cls._do_picking(cls.po.picking_ids)
 
     def test_01_cost_from_po_move(self):
         """
         Test the price unit is taken from the cost of the stock move associated to
         the PO
         """
+        # Create PO:
+        self.product_fifo_1.standard_price = 1234
+        po = self.po_model.create(
+            {
+                "partner_id": self.partner_id.id,
+            }
+        )
+        pol_1 = self.pol_model.create(
+            {
+                "name": self.product_fifo_1.name,
+                "order_id": po.id,
+                "product_id": self.product_fifo_1.id,
+                "product_qty": 20.0,
+                "product_uom": self.product_fifo_1.uom_id.id,
+                "price_unit": 100.0,
+                "date_planned": Datetime.now(),
+            }
+        )
+        po.button_confirm()
+        self._do_picking(po.picking_ids)
         self.product_fifo_1.standard_price = 1234  # this should not be taken
         supplier_view = self.env.ref("rma_purchase.view_rma_line_form")
         rma_line = Form(
             self.rma_line.with_context(supplier=1).with_user(self.rma_basic_user),
             view=supplier_view.id,
         )
-        rma_line.partner_id = self.po.partner_id
-        rma_line.purchase_order_line_id = self.pol_1
+        rma_line.partner_id = po.partner_id
+        rma_line.purchase_order_line_id = pol_1
         rma_line.price_unit = 4356
         rma_line = rma_line.save()
         rma_line.action_rma_to_approve()
@@ -55,9 +55,9 @@ class TestRmaStockAccountPurchase(TestRmaStockAccount):
         # The price is not the standard price, is the value of the incoming layer
         # of the PO
         rma_move_value = picking.move_lines.stock_valuation_layer_ids.value
-        po_move_value = self.po.picking_ids.mapped(
-            "move_lines.stock_valuation_layer_ids"
-        )[-1].value
+        po_move_value = po.picking_ids.mapped("move_lines.stock_valuation_layer_ids")[
+            -1
+        ].value
         self.assertEqual(-rma_move_value, po_move_value)
         # Test the accounts used
         account_move = picking.move_lines.stock_valuation_layer_ids.account_move_id