diff --git a/README.md b/README.md
index 5233df9..f3f061a 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,5 @@
 # functional test:
 ```
-apt -y install coturn
 . /home/docker/turn.$(hostname)/env
-turnutils_uclient -p 5349 -W $TURN_SECRET -v -y turn.$(hostname).
-apt remove --purge coturn
+docker run -ti coturn/coturn turnutils_uclient -p 5349 -W $TURN_SECRET -v -y turn.$(hostname).
 ```