diff --git a/README.md b/README.md
index e2244dc..2d34b9b 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,15 @@ Credentials are available [on request](mailto:remi@heredero.ch).
 Details in [pico-sensor/README.md](pico-sensor/README.md).
 
 
+## Test environment
+[(Back to top)](#table-of-contents)
+
+A partial test environment is deployed on the server. <br>
+Web app has a second container with the same code but made a GET request on `/test` instead of `/raclette` for the 
+development environment. The gateway include a route to `/test` that return the 100 last measurement instead of the 
+last 24h. Has everything else is still a development environment, the database is the same for the test and 
+development environment.
+
 
 # Authors