diff --git a/lib/fog/libvirt/compute.rb b/lib/fog/libvirt/compute.rb
index da227b4..14f6c20 100644
--- a/lib/fog/libvirt/compute.rb
+++ b/lib/fog/libvirt/compute.rb
@@ -117,6 +117,12 @@ class Real
 
       class Mock
         include Shared
+
+        def enhance_uri(uri)
+          uri = 'test:///default' unless ::URI.parse(uri).scheme == 'test'
+
+          super(uri)
+        end
       end
     end
   end