diff --git a/test/docker/entrypoint.sh b/test/docker/entrypoint.sh
index 24b82bc04..890d90154 100644
--- a/test/docker/entrypoint.sh
+++ b/test/docker/entrypoint.sh
@@ -33,12 +33,12 @@ echo "starting nginx ..."
 nginx_pid=$!
 
 SECONDS=0
-
-while ! ps -ef | grep "nginx: master process" | grep -v grep; do 
+while [[ ! -f /var/run/nginx.pid ]] && [[ ! -f /var/run/nginx/nginx.pid ]]; do
     if (( SECONDS > 30 )); then
         echo "couldn't find nginx master process"
         exit 1
     fi
+    sleep 1
 done
 
 cat /etc/nginx-agent/nginx-agent.conf;