Fix check for error text on Python 3.7 (#278)

diff --git a/tests/test_jwt.py b/tests/test_jwt.py
index 22c5bc5..4a64717 100644
--- a/tests/test_jwt.py
+++ b/tests/test_jwt.py
@@ -118,7 +118,7 @@
 def test_decode_bad_token_not_base64():
     with pytest.raises((ValueError, TypeError)) as excinfo:
         jwt.decode('1.2.3', PUBLIC_CERT_BYTES)
-    assert excinfo.match(r'Incorrect padding')
+    assert excinfo.match(r'Incorrect padding|more than a multiple of 4')
 
 
 def test_decode_bad_token_not_json():