diff --git a/test/README.md b/test/README.md
index a8f62ddfd..65046ec28 100644
--- a/test/README.md
+++ b/test/README.md
@@ -318,9 +318,11 @@ locally but installed directly from OS repositories!
 
 By default we test against latest nightly builds. If you wish to test against other
 flavors (e.g. rel-eng) specify the `COMPOSE_URL` environment variable to point to
-the respective URL (stopping before the `/compose/` path). See
+the respective URL (stopping before the `/compose/` path). See the image below or
 `schutzbot/prepare-rhel-internal.sh` for more details.
 
+!['Define COMPOSE_URL'](./define_compose_url.png)
+
 ### Replay internal Pipeline manually
 
 If you wish to execute the internal Pipeline by hand, often to verify changes made to it
diff --git a/test/define_compose_url.png b/test/define_compose_url.png
new file mode 100644
index 000000000..17d147fba
Binary files /dev/null and b/test/define_compose_url.png differ