diff --git a/virtualpdu/tests/snmp_error_indications.py b/virtualpdu/tests/snmp_error_indications.py
index 9cf72d5..4b74736 100644
--- a/virtualpdu/tests/snmp_error_indications.py
+++ b/virtualpdu/tests/snmp_error_indications.py
@@ -175,3 +175,15 @@ class SNMPApplicationError(SNMPErrorIndication):
 
 class OidNotIncreasing(SNMPApplicationError):
     pass
+
+
+class ReportPduReceived(SNMPErrorIndication):
+    pass
+
+
+class UnknownUserName(SNMPErrorIndication):
+    pass
+
+
+class WrongDigest(SNMPErrorIndication):
+    pass
diff --git a/virtualpdu/tests/unit/test_snmp_client.py b/virtualpdu/tests/unit/test_snmp_client.py
index c0159b5..bc4536e 100644
--- a/virtualpdu/tests/unit/test_snmp_client.py
+++ b/virtualpdu/tests/unit/test_snmp_client.py
@@ -17,6 +17,9 @@ from mock import sentinel
 from pysnmp.proto import errind
 from pysnmp.proto.errind import ErrorIndication
 from pysnmp.proto.rfc1905 import NoSuchInstance
+
+import testtools
+
 from virtualpdu.tests import base
 from virtualpdu.tests import snmp_client
 from virtualpdu.tests import snmp_error_indications
@@ -92,8 +95,8 @@ class TestSnmpClient(base.TestCase):
 
             exception_class = snmp_error_indications.__dict__.get(class_name)
 
-            self.assertRaises(exception_class,
-                              self.snmp_client.get_one, oid)
+            with testtools.ExpectedException(exception_class):
+                self.snmp_client.get_one(oid)
 
     def test_set(self):
         oid = (1, 3, 6)