tests: fix client setup

Author: Laure-di

scaleway/tests/test_total_count_legacy.py

@@ -12,7 +12,7 @@
 
 class TestTotalCountLegacy(unittest.TestCase):
     def setUp(self) -> None:
-        self.client = Client()
+        self.client = Client.from_config_file_and_env()
         self.instance_api = InstanceV1API(self.client, bypass_validation=True)
 
     def test_list_servers_type(self):