diff --git a/ceilometer/tests/network/services/test_fwaas.py b/ceilometer/tests/network/services/test_fwaas.py
index f59743d56..91e56cf53 100644
--- a/ceilometer/tests/network/services/test_fwaas.py
+++ b/ceilometer/tests/network/services/test_fwaas.py
@@ -111,9 +111,9 @@ class TestFirewallPollster(_BaseTestFWPollster):
 
         for vpn in self.fake_get_fw_service():
             if vpn['status'] == 'error':
-                self.assertTrue(vpn not in discovered_fws)
+                self.assertNotIn(vpn, discovered_fws)
             else:
-                self.assertTrue(vpn in discovered_fws)
+                self.assertIn(vpn, discovered_fws)
 
 
 class TestIPSecConnectionsPollster(_BaseTestFWPollster):
diff --git a/ceilometer/tests/network/services/test_lbaas.py b/ceilometer/tests/network/services/test_lbaas.py
index ed37c3485..a76dc0fa9 100644
--- a/ceilometer/tests/network/services/test_lbaas.py
+++ b/ceilometer/tests/network/services/test_lbaas.py
@@ -157,9 +157,9 @@ class TestLBPoolPollster(_BaseTestLBPollster):
         self.assertEqual(4, len(discovered_pools))
         for pool in self.fake_get_pools():
             if pool['status'] == 'error':
-                self.assertTrue(pool not in discovered_pools)
+                self.assertNotIn(pool, discovered_pools)
             else:
-                self.assertTrue(pool in discovered_pools)
+                self.assertIn(pool, discovered_pools)
 
 
 class TestLBVipPollster(_BaseTestLBPollster):
@@ -280,9 +280,9 @@ class TestLBVipPollster(_BaseTestLBPollster):
         self.assertEqual(4, len(discovered_vips))
         for pool in self.fake_get_vips():
             if pool['status'] == 'error':
-                self.assertTrue(pool not in discovered_vips)
+                self.assertNotIn(pool, discovered_vips)
             else:
-                self.assertTrue(pool in discovered_vips)
+                self.assertIn(pool, discovered_vips)
 
 
 class TestLBMemberPollster(_BaseTestLBPollster):
@@ -374,9 +374,9 @@ class TestLBMemberPollster(_BaseTestLBPollster):
         self.assertEqual(4, len(discovered_members))
         for pool in self.fake_get_members():
             if pool['status'] == 'error':
-                self.assertTrue(pool not in discovered_members)
+                self.assertNotIn(pool, discovered_members)
             else:
-                self.assertTrue(pool in discovered_members)
+                self.assertIn(pool, discovered_members)
 
 
 class TestLBHealthProbePollster(_BaseTestLBPollster):
diff --git a/ceilometer/tests/network/services/test_vpnaas.py b/ceilometer/tests/network/services/test_vpnaas.py
index 864a2efb3..65b9f1a6f 100644
--- a/ceilometer/tests/network/services/test_vpnaas.py
+++ b/ceilometer/tests/network/services/test_vpnaas.py
@@ -116,9 +116,9 @@ class TestVPNServicesPollster(_BaseTestVPNPollster):
 
         for vpn in self.fake_get_vpn_service():
             if vpn['status'] == 'error':
-                self.assertTrue(vpn not in discovered_vpns)
+                self.assertNotIn(vpn, discovered_vpns)
             else:
-                self.assertTrue(vpn in discovered_vpns)
+                self.assertIn(vpn, discovered_vpns)
 
 
 class TestIPSecConnectionsPollster(_BaseTestVPNPollster):