diff --git a/test_flask_kerberos.py b/test_flask_kerberos.py
index 3cd3ee6..75f3017 100644
--- a/test_flask_kerberos.py
+++ b/test_flask_kerberos.py
@@ -50,7 +50,7 @@ def test_authorized(self, clean, name, response, step, init):
         c = self.app.test_client()
         r = c.get('/', headers={'Authorization': 'Negotiate CTOKEN'})
         self.assertEqual(r.status_code, 200)
-        self.assertEqual(r.data, 'user@EXAMPLE.ORG')
+        self.assertEqual(r.data, b'user@EXAMPLE.ORG')
         self.assertEqual(r.headers.get('WWW-Authenticate'), 'negotiate STOKEN')
         self.assertEqual(init.mock_calls, [mock.call('HTTP@example.org')])
         self.assertEqual(step.mock_calls, [mock.call(state, 'CTOKEN')])
@@ -77,7 +77,7 @@ def test_authorized_no_mutual_auth(self, clean, name, response, step, init):
         c = self.app.test_client()
         r = c.get('/', headers={'Authorization': 'Negotiate CTOKEN'})
         self.assertEqual(r.status_code, 200)
-        self.assertEqual(r.data, 'user@EXAMPLE.ORG')
+        self.assertEqual(r.data, b'user@EXAMPLE.ORG')
         self.assertEqual(r.headers.get('WWW-Authenticate'), None)
         self.assertEqual(init.mock_calls, [mock.call('HTTP@example.org')])
         self.assertEqual(step.mock_calls, [mock.call(state, 'CTOKEN')])