1 files changed, 11 insertions, 0 deletions
diff --git a/tests/primitives/test_hashes.py b/tests/primitives/test_hashes.py
index 901ddabb..805d992b 100644
--- a/tests/primitives/test_hashes.py
+++ b/tests/primitives/test_hashes.py
@@ -13,11 +13,22 @@
 
 from __future__ import absolute_import, division, print_function
 
+import pytest
+
+import six
+
 from cryptography.primitives import hashes
 
 from .utils import generate_base_hash_test
 
 
+class TestBaseHash(object):
+    def test_base_hash_reject_unicode(self, api):
+        m = hashes.SHA1(api=api)
+        with pytest.raises(TypeError):
+            m.update(six.u("\u00FC"))
+
+
 class TestSHA1(object):
     test_SHA1 = generate_base_hash_test(
         hashes.SHA1,