Initialise openstack.Manager() with config from self.nova.
diff --git a/kong/tests/test_images.py b/kong/tests/test_images.py
index 2fc0b61..0b43182 100644
--- a/kong/tests/test_images.py
+++ b/kong/tests/test_images.py
@@ -9,7 +9,7 @@
 
     def setUp(self):
         super(ImagesTest, self).setUp()
-        self.os = openstack.Manager()
+        self.os = openstack.Manager(self.nova)
 
         host = self.os.config.nova.host
         port = self.os.config.nova.port