diff --git a/tests/docker-compose.yml b/tests/docker-compose.yml
index e6c4eb8..ff07f09 100644
--- a/tests/docker-compose.yml
+++ b/tests/docker-compose.yml
@@ -29,6 +29,7 @@ services:
     environment:
       - SPLUNK_HEC_URL=https://splunk:8088
       - SPLUNK_HEC_TOKEN=${SPLUNK_HEC_TOKEN}
+      - SC4S_DEST_SPLUNK_SC4S_METRICS_HEC=yes
       - SC4S_SOURCE_TLS_ENABLE=no
       - SC4S_DEST_SPLUNK_HEC_TLS_VERIFY=no
       - SC4S_LISTEN_JUNIPER_NETSCREEN_TCP_PORT=5000