diff --git a/ceilometer/tests/ipmi/pollsters/base.py b/ceilometer/tests/ipmi/pollsters/base.py
index 780f8afa7..4b8e58839 100644
--- a/ceilometer/tests/ipmi/pollsters/base.py
+++ b/ceilometer/tests/ipmi/pollsters/base.py
@@ -44,9 +44,8 @@ class TestPollsterBase(base.BaseTestCase):
         nm.read_temperature_all.side_effect = self.fake_data
         nm.read_power_all.side_effect = self.fake_data
         nm.read_sensor_any.side_effect = self.fake_sensor_data
-
-        self.mgr = manager.AgentManager()
-
+        # We should mock the pollster first before initialize the Manager
+        # so that we don't trigger the sudo in pollsters' __init__().
         self.useFixture(mockpatch.Patch(
             'ceilometer.ipmi.platform.intel_node_manager.NodeManager',
             return_value=nm))
@@ -55,6 +54,8 @@ class TestPollsterBase(base.BaseTestCase):
             'ceilometer.ipmi.platform.ipmi_sensor.IPMISensor',
             return_value=nm))
 
+        self.mgr = manager.AgentManager()
+
         self.pollster = self.make_pollster()
 
     def _verify_metering(self, length, expected_vol=None, node=None):
diff --git a/ceilometer/tests/ipmi/test_manager.py b/ceilometer/tests/ipmi/test_manager.py
index 9d4bed548..72b8f96b4 100644
--- a/ceilometer/tests/ipmi/test_manager.py
+++ b/ceilometer/tests/ipmi/test_manager.py
@@ -27,6 +27,10 @@ from ceilometer.tests.agent import agentbase
 class TestManager(base.BaseTestCase):
 
     @mock.patch('ceilometer.pipeline.setup_pipeline', mock.MagicMock())
+    @mock.patch('ceilometer.ipmi.pollsters.node._Base.__init__',
+                mock.Mock(return_value=None))
+    @mock.patch('ceilometer.ipmi.pollsters.sensor.SensorPollster.__init__',
+                mock.Mock(return_value=None))
     def test_load_plugins(self):
         mgr = manager.AgentManager()
         self.assertIsNotNone(list(mgr.extensions))
@@ -35,6 +39,10 @@ class TestManager(base.BaseTestCase):
 class TestRunTasks(agentbase.BaseAgentManagerTestCase):
 
     @staticmethod
+    @mock.patch('ceilometer.ipmi.pollsters.node._Base.__init__',
+                mock.Mock(return_value=None))
+    @mock.patch('ceilometer.ipmi.pollsters.sensor.SensorPollster.__init__',
+                mock.Mock(return_value=None))
     def create_manager():
         return manager.AgentManager()