diff --git a/partner_tier_validation/__init__.py b/partner_tier_validation/__init__.py
index 31660d6a9..c0d9f3d12 100644
--- a/partner_tier_validation/__init__.py
+++ b/partner_tier_validation/__init__.py
@@ -1,3 +1,4 @@
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
 from . import models
+from .hooks import post_init_hook
diff --git a/partner_tier_validation/__manifest__.py b/partner_tier_validation/__manifest__.py
index 8321c7d0a..7b2ca7f1f 100644
--- a/partner_tier_validation/__manifest__.py
+++ b/partner_tier_validation/__manifest__.py
@@ -14,4 +14,5 @@
         "data/tier_definition.xml",
         "views/res_partner_view.xml",
     ],
+    "post_init_hook": "post_init_hook",
 }
diff --git a/partner_tier_validation/data/tier_definition.xml b/partner_tier_validation/data/tier_definition.xml
index 4a5436fa0..528842bca 100644
--- a/partner_tier_validation/data/tier_definition.xml
+++ b/partner_tier_validation/data/tier_definition.xml
@@ -5,6 +5,7 @@
         <field name="review_type">group</field>
         <field name="reviewer_group_id" ref="base.group_user" />
         <field name="definition_type">domain</field>
+        <field name="active" eval="False" />
         <field
             name="definition_domain"
         >["&amp;",["is_company","=",True],"|",["active","=",True],["active","=",False]]</field>
diff --git a/partner_tier_validation/hooks.py b/partner_tier_validation/hooks.py
new file mode 100644
index 000000000..0bfebf185
--- /dev/null
+++ b/partner_tier_validation/hooks.py
@@ -0,0 +1,18 @@
+# Copyright 2021 Tecnativa - Víctor Martínez
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from odoo import SUPERUSER_ID
+from odoo.api import Environment
+from odoo.tools import config
+
+
+def post_init_hook(cr, pool):
+    """
+    We need to activate the rule only if we are not in a test environment.
+    """
+    if not config["test_enable"]:
+        env = Environment(cr, SUPERUSER_ID, {})
+        tier_partner = env.ref(
+            "partner_tier_validation.partner_tier_definition_company_only"
+        )
+        tier_partner.write({"active": True})