diff --git a/test/test_crypto.py b/test/test_crypto.py
index f924220..cf55691 100644
--- a/test/test_crypto.py
+++ b/test/test_crypto.py
@@ -3,7 +3,11 @@ from pbc_client.pbc_types import Address
 
 def test_sender_authentication():
     sender_authentication = SenderAuthentication('aa')
-    assert sender_authentication.sender_address() == Address.from_string('00e72e44eab933faaf1fd4ce94bb57e08bff98a1ed')
+    assert str(sender_authentication.sender_address()) == '00e72e44eab933faaf1fd4ce94bb57e08bff98a1ed'
+
+def test_sender_authentication_2():
+    sender_authentication = SenderAuthentication('2')
+    assert str(sender_authentication.sender_address()) =='00b2e734b5d8da089318d0d2b076c19f59c450855a'
 
 def test_sign():
     sender_authentication = SenderAuthentication('01')