diff --git a/moto/kms/models.py b/moto/kms/models.py
index fb4040617..9d13589c1 100644
--- a/moto/kms/models.py
+++ b/moto/kms/models.py
@@ -64,7 +64,6 @@ class Key(BaseModel):
         )
         key.key_rotation_status = properties['EnableKeyRotation']
         key.enabled = properties['Enabled']
-
         return key
 
     def get_cfn_attribute(self, attribute_name):
@@ -93,7 +92,6 @@ class KmsBackend(BaseBackend):
         key = self.keys[self.get_key_id(key_id)]
         key.tags = tags
 
-
     def list_resource_tags(self, key_id):
         key = self.keys[self.get_key_id(key_id)]
         return key.tags
diff --git a/moto/kms/responses.py b/moto/kms/responses.py
index b66ca267c..2674f765c 100644
--- a/moto/kms/responses.py
+++ b/moto/kms/responses.py
@@ -42,13 +42,13 @@ class KmsResponse(BaseResponse):
         key_id = self.parameters.get('KeyId')
         description = self.parameters.get('Description')
 
-        self.kms_backend.update_key_description(key_id,description)
+        self.kms_backend.update_key_description(key_id, description)
         return json.dumps(None)
 
     def tag_resource(self):
         key_id = self.parameters.get('KeyId')
         tags = self.parameters.get('Tags')
-        self.kms_backend.tag_resource(key_id,tags)
+        self.kms_backend.tag_resource(key_id, tags)
         return json.dumps({})
 
     def list_resource_tags(self):