diff --git a/test/test_crypto.py b/test/test_crypto.py
index 7f57f79..f924220 100644
--- a/test/test_crypto.py
+++ b/test/test_crypto.py
@@ -1,5 +1,9 @@
 from pbc_client.crypto import SenderAuthentication, sign_transaction
+from pbc_client.pbc_types import Address
 
+def test_sender_authentication():
+    sender_authentication = SenderAuthentication('aa')
+    assert sender_authentication.sender_address() == Address.from_string('00e72e44eab933faaf1fd4ce94bb57e08bff98a1ed')
 
 def test_sign():
     sender_authentication = SenderAuthentication('01')