diff --git a/nova/tests/scheduler/test_host_filter.py b/nova/tests/scheduler/test_host_filter.py
index b1892dab..b016923c 100644
--- a/nova/tests/scheduler/test_host_filter.py
+++ b/nova/tests/scheduler/test_host_filter.py
@@ -19,12 +19,9 @@ Tests For Scheduler Host Filters.
 import json
 
 from nova import exception
-from nova import flags
 from nova import test
 from nova.scheduler import host_filter
 
-FLAGS = flags.FLAGS
-
 
 class FakeZoneManager:
     pass
@@ -57,9 +54,8 @@ class HostFilterTestCase(test.TestCase):
                 'host_name-label': 'xs-%s' % multiplier}
 
     def setUp(self):
-        self.old_flag = FLAGS.default_host_filter
-        FLAGS.default_host_filter = \
-                            'nova.scheduler.host_filter.AllHostsFilter'
+        default_host_filter = 'nova.scheduler.host_filter.AllHostsFilter'
+        self.flags(default_host_filter=default_host_filter)
         self.instance_type = dict(name='tiny',
                 memory_mb=50,
                 vcpus=10,
@@ -98,9 +94,6 @@ class HostFilterTestCase(test.TestCase):
         host09['xpu_arch'] = 'fermi'
         host09['xpu_info'] = 'Tesla 2150'
 
-    def tearDown(self):
-        FLAGS.default_host_filter = self.old_flag
-
     def test_choose_filter(self):
         # Test default filter ...
         hf = host_filter.choose_host_filter()
diff --git a/nova/tests/scheduler/test_least_cost_scheduler.py b/nova/tests/scheduler/test_least_cost_scheduler.py
index 49791053..fbe6b2f7 100644
--- a/nova/tests/scheduler/test_least_cost_scheduler.py
+++ b/nova/tests/scheduler/test_least_cost_scheduler.py
@@ -16,13 +16,11 @@
 Tests For Least Cost Scheduler
 """
 
-from nova import flags
 from nova import test
 from nova.scheduler import least_cost
 from nova.tests.scheduler import test_zone_aware_scheduler
 
 MB = 1024 * 1024
-FLAGS = flags.FLAGS
 
 
 class FakeHost(object):
@@ -95,10 +93,9 @@ class LeastCostSchedulerTestCase(test.TestCase):
         self.assertWeights(expected, num, request_spec, hosts)
 
     def test_noop_cost_fn(self):
-        FLAGS.least_cost_scheduler_cost_functions = [
-            'nova.scheduler.least_cost.noop_cost_fn',
-        ]
-        FLAGS.noop_cost_fn_weight = 1
+        self.flags(least_cost_scheduler_cost_functions=[
+                'nova.scheduler.least_cost.noop_cost_fn'],
+                noop_cost_fn_weight=1)
 
         num = 1
         request_spec = {}
@@ -109,10 +106,9 @@ class LeastCostSchedulerTestCase(test.TestCase):
         self.assertWeights(expected, num, request_spec, hosts)
 
     def test_cost_fn_weights(self):
-        FLAGS.least_cost_scheduler_cost_functions = [
-            'nova.scheduler.least_cost.noop_cost_fn',
-        ]
-        FLAGS.noop_cost_fn_weight = 2
+        self.flags(least_cost_scheduler_cost_functions=[
+                'nova.scheduler.least_cost.noop_cost_fn'],
+                noop_cost_fn_weight=2)
 
         num = 1
         request_spec = {}
@@ -123,10 +119,9 @@ class LeastCostSchedulerTestCase(test.TestCase):
         self.assertWeights(expected, num, request_spec, hosts)
 
     def test_compute_fill_first_cost_fn(self):
-        FLAGS.least_cost_scheduler_cost_functions = [
-            'nova.scheduler.least_cost.compute_fill_first_cost_fn',
-        ]
-        FLAGS.compute_fill_first_cost_fn_weight = 1
+        self.flags(least_cost_scheduler_cost_functions=[
+                'nova.scheduler.least_cost.compute_fill_first_cost_fn'],
+                compute_fill_first_cost_fn_weight=1)
 
         num = 1
         instance_type = {'memory_mb': 1024}