Fix new tests.

Author: serhiy-storchaka

Lib/_base64.py

@@ -63,10 +63,10 @@ def b85decode(b):
         raise ValueError(e) from None
 
 
-def z85encode(s):
+def z85encode(s, pad=False):
     s = _bytes_from_encode_data(s)
     try:
-        return b2a_base85(s, newline=False, z85=True)
+        return b2a_base85(s, pad=pad, newline=False, z85=True)
     except Error as e:
         raise ValueError(e) from None
 

Lib/test/test_base64.py

@@ -891,6 +891,7 @@ def test_b85_padding(self):
         eq(base64.b85decode(b'czAetcmMzZ'), b"xxxxx\x00\x00\x00")
 
     def test_z85_padding(self):
+        base64 = self.module
         eq = self.assertEqual
 
         eq(base64.z85encode(b"x", pad=True), b'CMmZz')