diff --git a/test_requests_kerberos.py b/test_requests_kerberos.py
index 0077223..23531e0 100644
--- a/test_requests_kerberos.py
+++ b/test_requests_kerberos.py
@@ -568,7 +568,7 @@ class KerberosTestCase(unittest.TestCase):
                 principal=None)
 
     def test_delegation(self):
-        with patch.multiple('kerberos',
+        with patch.multiple(kerberos_module_name,
                             authGSSClientInit=clientInit_complete,
                             authGSSClientResponse=clientResponse,
                             authGSSClientStep=clientStep_continue):
@@ -624,7 +624,7 @@ class KerberosTestCase(unittest.TestCase):
             response.headers = {'www-authenticate': 'negotiate token'}
             host = urlparse(response.url).hostname
             auth = requests_kerberos.HTTPKerberosAuth(principal="user@REALM")
-            auth.generate_request_header(response, host),
+            auth.generate_request_header(response, host)
             clientInit_complete.assert_called_with(
                 "HTTP@www.example.org",
                 gssflags=(
@@ -642,7 +642,7 @@ class KerberosTestCase(unittest.TestCase):
             response.headers = {'www-authenticate': 'negotiate token'}
             host = urlparse(response.url).hostname
             auth = requests_kerberos.HTTPKerberosAuth(hostname_override="otherhost.otherdomain.org")
-            auth.generate_request_header(response, host),
+            auth.generate_request_header(response, host)
             clientInit_complete.assert_called_with(
                 "HTTP@otherhost.otherdomain.org",
                 gssflags=(