Renamed variabled

tests/resources/test_tariff.py

@@ -13,10 +13,10 @@ class TariffTests(unittest.TestCase):
         tariff_names = []
         tariff_codes = []
         self.assertEqual(len(tariffs), 35)
-        for dc in tariffs:
-            self.assertIsInstance(dc, Tariff)
-            tariff_names.append(dc.name)
-            tariff_codes.append(dc.code)
+        for tariff in tariffs:
+            self.assertIsInstance(tariff, Tariff)
+            tariff_names.append(tariff.name)
+            tariff_codes.append(tariff.code)
 
         self.assertIn(
             "ADSL 1000 min a fix",