diff --git a/kfet/tests/test_config.py b/kfet/tests/test_config.py
index 79781c0d..03c9cf3c 100644
--- a/kfet/tests/test_config.py
+++ b/kfet/tests/test_config.py
@@ -22,13 +22,20 @@ class ConfigTest(TestCase):
     def test_get(self):
         self.assertTrue(hasattr(kfet_config, 'subvention_cof'))
 
+    def test_subvention_cof(self):
+        reduction_cof = Decimal('20')
+        subvention_cof = Decimal('25')
+        kfet_config.set(reduction_cof=reduction_cof)
+
+        self.assertEqual(kfet_config.subvention_cof, subvention_cof)
+
     def test_set_decimal(self):
         """Test field of decimal type."""
-        subvention_cof = Decimal('10')
+        reduction_cof = Decimal('10')
         # IUT
-        kfet_config.set(subvention_cof=subvention_cof)
+        kfet_config.set(reduction_cof=reduction_cof)
         # check
-        self.assertEqual(kfet_config.subvention_cof, subvention_cof)
+        self.assertEqual(kfet_config.reduction_cof, reduction_cof)
 
     def test_set_modelinstance(self):
         """Test field of model instance type."""
diff --git a/kfet/tests.py b/kfet/tests/test_statistic.py
similarity index 97%
rename from kfet/tests.py
rename to kfet/tests/test_statistic.py
index 991b2545..4fb0785d 100644
--- a/kfet/tests.py
+++ b/kfet/tests/test_statistic.py
@@ -5,7 +5,7 @@ from unittest.mock import patch
 from django.test import TestCase, Client
 from django.contrib.auth.models import User, Permission
 
-from .models import Account, Article, ArticleCategory
+from kfet.models import Account, Article, ArticleCategory
 
 
 class TestStats(TestCase):