diff --git a/tests/.env.test b/tests/.env.test
index d6d3712..1aa9740 100644
--- a/tests/.env.test
+++ b/tests/.env.test
@@ -84,6 +84,7 @@ USE_IF_SET=true
 ALTERNATE=${USE_IF_SET:+alternate}
 
 # https://github.com/motdotla/dotenv-expand/issues/123
+# IMPORTANT: behavior is DIFFERENT than should be (and as in dotenvx): https://github.com/dotenvx/dotenvx/pull/448
 FIRST_PAGE_URL=${PROJECT_PUBLIC_HOST}/first-page
 MOCK_SERVER_HOST=http://localhost:${MOCK_SERVER_PORT}
 MOCK_SERVER_PORT=8090