diff --git a/.env.sample b/.env.sample
index 0f0739d..cc94519 100644
--- a/.env.sample
+++ b/.env.sample
@@ -3,6 +3,7 @@ TYPE=abra-integration-test-recipe
 DOMAIN=abra-integration-test-recipe.example.com
 
 COMPOSE_FILE="compose.yml"
+#COMPOSE_FILE="$COMPOSE_FILE:compose.extra_env.yml"
 
 ## Domain aliases
 #EXTRA_DOMAINS=', `www.{{ .Name }}.example.com`'