diff --git a/reg-tests/contrib/prometheus.vtc b/reg-tests/contrib/prometheus.vtc
index 1ebeb29..ebe0b87 100644
--- a/reg-tests/contrib/prometheus.vtc
+++ b/reg-tests/contrib/prometheus.vtc
@@ -71,6 +71,15 @@
 	expect resp.body ~ ".*haproxy_server_idle_connections_limit{proxy=\"be\",server=\"s1\"} NaN.*"
 	expect resp.body ~ ".*haproxy_server_idle_connections_limit{proxy=\"be\",server=\"s2\"} 42.*"
 
+	# test well known labels presence
+	expect resp.body ~ ".*haproxy_process_build_info{version=\".*\"} 1.*"
+	expect resp.body ~ ".*haproxy_frontend_http_responses_total{proxy=\"stats\",code=\"4xx\"} 0.*"
+	expect resp.body ~ ".*haproxy_frontend_status{proxy=\"fe\",state=\"UP\"} 1.*"
+	expect resp.body ~ ".*haproxy_listener_status{proxy=\"stats\",listener=\"sock-1\",state=\"WAITING\"} 0.*"
+	expect resp.body ~ ".*haproxy_backend_status{proxy=\"be\",state=\"UP\"} 1.*"
+	expect resp.body ~ ".*haproxy_server_status{proxy=\"be\",server=\"s1\",state=\"DOWN\"} 0.*"
+	expect resp.body ~ ".*haproxy_server_check_status{proxy=\"be\",server=\"s2\",state=\"HANA\"} 0.*"
+
 	# test scope
 	txreq -url "/metrics?scope="
 	rxresp