diff --git a/docs/tools/deploy-to-test.sh b/docs/tools/deploy-to-test.sh
index a7fc98bb620..44e7687c905 100755
--- a/docs/tools/deploy-to-test.sh
+++ b/docs/tools/deploy-to-test.sh
@@ -6,7 +6,9 @@
 # Before first use of this script:
 # 1) Set up building documentation according to https://github.com/ClickHouse/ClickHouse/tree/master/docs/tools#use-buildpy-use-build-py
 # 2) Create https://github.com/GIT_USER/clickhouse.github.io repo (replace GIT_USER with your GitHub login)
-# 3) Send email on address from https://clickhouse.tech/#contacts asking to create GIT_USER-test.clickhouse.tech domain
+# 3) Enable GitHub Pages in settings of this repo
+# 4) Add file named CNAME in root of this repo with "GIT_USER-test.clickhouse.tech" content (without quotes)
+# 5) Send email on address from https://clickhouse.tech/#contacts asking to create GIT_USER-test.clickhouse.tech domain
 #
 set -ex