diff --git a/pms/tests/test_pms_pricelist.py b/pms/tests/test_pms_pricelist.py
index f1ed184d8..d10756319 100644
--- a/pms/tests/test_pms_pricelist.py
+++ b/pms/tests/test_pms_pricelist.py
@@ -1,3 +1,4 @@
+from odoo.exceptions import ValidationError
 from odoo.tests import common, tagged
 
 
@@ -7,10 +8,32 @@ class TestPmsPricelist(common.TransactionCase):
 
         # ARRANGE
         key = "product.product_pricelist_setting"
-        value = "Advance"
+        value = "advanced"
 
         # ACT
         found_value = self.env["ir.config_parameter"].sudo().get_param(key)
 
         # ASSERT
-        self.assertEqual(found_value, value, "The register wasn't created")
+        self.assertEqual(found_value, value, "Parameter doesn't exist")
+
+    def test_product_pricelist_setting_modified(self):
+
+        # ARRANGE
+        key = "product.product_pricelist_setting"
+        value = "basic"
+
+        # ACT & ASSERT
+        with self.assertRaises(ValidationError), self.cr.savepoint():
+            self.env["ir.config_parameter"].set_param(key, value)
+
+    def test_product_pricelist_setting_unlink(self):
+
+        # ARRANGE
+        key = "product.product_pricelist_setting"
+        value = "advanced"
+
+        # ACT & ASSERT
+        with self.assertRaises(ValidationError), self.cr.savepoint():
+            self.env["ir.config_parameter"].search(
+                [("key", "=", key), ("value", "=", value)]
+            ).unlink()