diff --git a/mercadopago/config/config.py b/mercadopago/config/config.py
index e901ce5..20ae7a9 100644
--- a/mercadopago/config/config.py
+++ b/mercadopago/config/config.py
@@ -10,7 +10,7 @@ class Config:
     """
 
     def __init__(self):
-        self.__version = "2.2.0"
+        self.__version = "2.2.1"
         self.__user_agent = "MercadoPago Python SDK v" + self.__version
         self.__product_id = "bc32bpftrpp001u8nhlg"
         self.__tracking_id = "platform:" + platform.python_version()
diff --git a/mercadopago/resources/preference.py b/mercadopago/resources/preference.py
index 1afe86d..2b26e0a 100644
--- a/mercadopago/resources/preference.py
+++ b/mercadopago/resources/preference.py
@@ -83,4 +83,4 @@ def search(self, filters=None, request_options=None):
         """
 
         return self._get(uri="/checkout/preferences/search", filters=filters,
-                         request_options=request_options)
\ No newline at end of file
+                         request_options=request_options)
diff --git a/setup.py b/setup.py
index 0bef904..fb7ddad 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
 
 setup(
     name="mercadopago",
-    version="2.2.0",
+    version="2.2.1",
     description="Mercadopago SDK module for Payments integration",
     author="Mercado Pago SDK",
     author_email="mp_sdk@mercadopago.com",
diff --git a/tests/test_preference.py b/tests/test_preference.py
index b9281f9..f7fe23b 100644
--- a/tests/test_preference.py
+++ b/tests/test_preference.py
@@ -3,6 +3,7 @@
 """
 import unittest
 
+import time
 import mercadopago
 
 
@@ -33,18 +34,22 @@ def test_all(self):
         preference_saved = self.sdk.preference().create(preference_object)
         self.assertEqual(preference_saved["status"], 201)
 
+        time.sleep(1)
+
         preference_object["items"][0]["title"] = "Testando 1 2 3"
 
         preference_update = self.sdk.preference().update(
             preference_saved["response"]["id"], preference_object)
         self.assertEqual(preference_update["status"], 200)
 
+        time.sleep(1)
         preference_saved = self.sdk.preference().get(
             preference_saved["response"]["id"])
 
         self.assertEqual(preference_saved["response"]["items"][0]["title"],
                          preference_object["items"][0]["title"])
 
+        time.sleep(1)
         preference_saved = self.sdk.preference().search()
 
         self.assertEqual(preference_saved["response"]["elements"][0]["items"][0],
diff --git a/tests/test_subscription.py b/tests/test_subscription.py
index d4ee7bd..43c9f99 100644
--- a/tests/test_subscription.py
+++ b/tests/test_subscription.py
@@ -114,7 +114,7 @@ def test_create_subscriptions_without_a_plan(self):
     @classmethod
     def create_card_token(cls):
         card_token_object = {
-            "card_number": "4074090000000004",
+            "card_number": "5031433215406351",
             "security_code": "123",
             "expiration_year": datetime.now().strftime("%Y"),
             "expiration_month": "12",