diff --git a/heat/tests/test_attributes.py b/heat/tests/test_attributes.py
index d263c3637b..da673fc3f8 100644
--- a/heat/tests/test_attributes.py
+++ b/heat/tests/test_attributes.py
@@ -11,6 +11,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import mock
 import testtools
 
 from heat.engine import attributes
@@ -59,11 +60,12 @@ class AttributeSchemaTest(testtools.TestCase):
                          attrs._attributes['bar_dep'].support_status().message)
 
     def test_old_attribute_schema_format(self):
-        s = 'Test description.'
-        self.assertIsInstance(attributes.Schema.from_attribute(s),
-                              attributes.Schema)
-        self.assertEqual('Test description.',
-                         attributes.Schema.from_attribute(s).description)
+        with mock.patch('heat.engine.attributes.warnings'):
+            s = 'Test description.'
+            self.assertIsInstance(attributes.Schema.from_attribute(s),
+                                  attributes.Schema)
+            self.assertEqual('Test description.',
+                             attributes.Schema.from_attribute(s).description)
 
 
 class AttributeTest(common.HeatTestCase):