diff --git a/code/daisy/daisy/tests/api/test_api_common.py b/code/daisy/daisy/tests/api/test_api_common.py
index 10be3059..b837cc83 100755
--- a/code/daisy/daisy/tests/api/test_api_common.py
+++ b/code/daisy/daisy/tests/api/test_api_common.py
@@ -2,6 +2,7 @@ from daisy import test
 from daisy.api import common
 from webob import exc
 from daisy.tests import fakes
+import mock
 
 
 class TestApiCommon(test.TestCase):
@@ -181,7 +182,8 @@ class TestApiCommon(test.TestCase):
         self.assertRaises(exc.HTTPBadRequest,
                           common.check_gateway_uniqueness, nets)
 
-    def test_valid_ip_ranges_with_cidr(self):
+    @mock.patch('daisy.api.common.valid_ip_ranges')
+    def test_valid_ip_ranges_with_cidr(self, fake_valid_ip_ranges):
         ip_ranges = [
             {
                 'start': '12.18.1.5',