diff --git a/tools/marvin/marvin/cloudstackConnection.py b/tools/marvin/marvin/cloudstackConnection.py
index 075defa47e5..c5cbb18dc9e 100644
--- a/tools/marvin/marvin/cloudstackConnection.py
+++ b/tools/marvin/marvin/cloudstackConnection.py
@@ -147,8 +147,10 @@ class CSConnection(object):
                 ).replace("+", "%20")]
             ) for r in params]
         )
-        signature = base64.encodestring(hmac.new(
-            self.securityKey, hash_str, hashlib.sha1).digest()).strip()
+        signature = base64.encodestring(
+            hmac.new(self.securityKey.encode('utf-8'),
+                     hash_str.encode('utf-8'),
+                     hashlib.sha1).digest()).strip()
         return signature
 
     def __sendPostReqToCS(self, url, payload):
diff --git a/tools/marvin/marvin/marvinLog.py b/tools/marvin/marvin/marvinLog.py
index 01ef904087d..c720186172b 100644
--- a/tools/marvin/marvin/marvinLog.py
+++ b/tools/marvin/marvin/marvinLog.py
@@ -40,7 +40,7 @@ class MarvinLog:
 
     def __new__(cls, logger_name):
         if not cls._instance:
-            cls._instance = super(MarvinLog, cls).__new__(cls, logger_name)
+            cls._instance = super(MarvinLog, cls).__new__(cls)
             return cls._instance
 
     def __init__(self, logger_name):