diff --git a/tests/test_preference.py b/tests/test_preference.py
index 82c4cb4..f7fe23b 100644
--- a/tests/test_preference.py
+++ b/tests/test_preference.py
@@ -3,8 +3,8 @@
 """
 import unittest
 
-import mercadopago
 import time
+import mercadopago
 
 
 class TestPreference(unittest.TestCase):