diff --git a/nova/tests/unit/virt/xenapi/client/test_session.py b/nova/tests/unit/virt/xenapi/client/test_session.py
index 10daef99fa38..6d575a06531c 100644
--- a/nova/tests/unit/virt/xenapi/client/test_session.py
+++ b/nova/tests/unit/virt/xenapi/client/test_session.py
@@ -22,6 +22,7 @@ from nova import exception
 from nova.tests.unit.virt.xenapi import stubs
 from nova import version
 from nova.virt.xenapi.client import session
+from nova.virt.xenapi import fake as xenapi_fake
 
 
 class SessionTestCase(stubs.XenAPITestBaseNoDB):
@@ -204,6 +205,7 @@ class CallPluginTestCase(stubs.XenAPITestBaseNoDB):
             def __init__(self, **kwargs):
                 "Skip the superclass's dirty init"
                 self.XenAPI = mock.MagicMock()
+                self.XenAPI.Failure = xenapi_fake.Failure
 
         return FakeXapiSession()
 
diff --git a/tests-py3.txt b/tests-py3.txt
index ab1d45f179e5..a80fba0d7557 100644
--- a/tests-py3.txt
+++ b/tests-py3.txt
@@ -24,7 +24,6 @@ nova.tests.unit.virt.libvirt.test_vif.LibvirtVifTestCase
 nova.tests.unit.virt.vmwareapi.test_images.VMwareImagesTestCase
 nova.tests.unit.virt.vmwareapi.test_read_write_util.ReadWriteUtilTestCase
 nova.tests.unit.virt.vmwareapi.test_vmops.VMwareVMOpsTestCase.test_spawn_mask_block_device_info_password
-nova.tests.unit.virt.xenapi.client.test_session.CallPluginTestCase
 nova.tests.unit.virt.xenapi.test_vm_utils.ResizeFunctionTestCase
 nova.tests.unit.virt.xenapi.test_vm_utils.ScanSrTestCase
 nova.tests.unit.virt.xenapi.test_vm_utils.UnplugVbdTestCase