diff --git a/deploy/env/prod/system.yaml b/deploy/env/prod/system.yaml
index a859bf9..efef65f 100644
--- a/deploy/env/prod/system.yaml
+++ b/deploy/env/prod/system.yaml
@@ -1,4 +1,8 @@
-# Production-only Grav config overrides.
+# Deployed-environment Grav config overrides (test AND prod).
+#
+# Both server environments share this one file so test stays a faithful dress
+# rehearsal of prod: deploy/env/test/system.yaml is a symlink to this file.
+# Edit here and both environments move together — never let them drift.
 #
 # Deep-merged OVER the committed user/config/system.yaml via Grav's
 # per-environment config mechanism: on the server this file is deployed to
@@ -8,9 +12,10 @@
 #
 # These values are deliberately NOT in the committed system.yaml because they
 # would break local development (see CLAUDE.md §1 — dev keeps twig.cache:false
-# so theme edits take effect immediately). Prod is the only place they apply.
+# so theme edits take effect immediately). They apply only on the deployed
+# hosts, never on a local dev checkout.
 #
-# Deploy with:  make remote-apply-env-prod
+# Deploy with:  make remote-apply-env-test  /  make remote-apply-env-prod
 # The user/env/ tree is outside the content repo's tracked folders, so it is
 # NOT restored by content-push / git-sync / remote-fetch-content — re-run the
 # target above after any fresh install.
diff --git a/deploy/env/test/system.yaml b/deploy/env/test/system.yaml
new file mode 120000
index 0000000..022f162
--- /dev/null
+++ b/deploy/env/test/system.yaml
@@ -0,0 +1 @@
+../prod/system.yaml
\ No newline at end of file