diff --git a/README.md b/README.md
index 4614fe1..deacd49 100644
--- a/README.md
+++ b/README.md
@@ -9,3 +9,6 @@ For docs:
 `godoc github.com/getlantern/fronted`
 
 See [ddftool](https://github.com/getlantern/ddftool) for more details on how to generate and tests fronting domains for the supported CDNs.
+
+[!NOTE]
+Since the masquerade domains and IP addresses can change, tests might fail and they need to be updated. You can basically ping some of the masquerade domains (from `default_masquerade.go`) and update the IPs accordingly.