diff --git a/sandbox/jenkins-test b/sandbox/jenkins-test
index 4b3d4cfe..0981c359 100755
--- a/sandbox/jenkins-test
+++ b/sandbox/jenkins-test
@@ -57,6 +57,7 @@ fi
 export PERCONA_TOOLKIT_BRANCH="$PWD"
 export PERCONA_TOOLKIT_SANDBOX="$MYSQL_BASE_DIR"
 export PATH="$PATH:/usr/sbin:$MYSQL_BASE_DIR/bin"
+export LANG="en_US.UTF-8"
 
 #############################
 # Check and start test env. #