diff --git a/script/build/test_startup.sh b/script/build/test_startup.sh
index 1b682be98..685d101ef 100755
--- a/script/build/test_startup.sh
+++ b/script/build/test_startup.sh
@@ -3,6 +3,7 @@ RAILS_ENV=$1
 APP_PORT=$2
 WS_PORT=$3
 
+rails r "Setting.set('developer_mode', true)"
 rails r "Setting.set('websocket_port', '#{WS_PORT}')"
 
 pumactl start --pidfile tmp/pids/puma.pid -d -p $APP_PORT -e $RAILS_ENV