diff --git a/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.IntegrationTests/Docker/docker-compose.yml b/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.IntegrationTests/Docker/docker-compose.yml
index 18849ce10..8b8f83c16 100644
--- a/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.IntegrationTests/Docker/docker-compose.yml
+++ b/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.IntegrationTests/Docker/docker-compose.yml
@@ -38,7 +38,9 @@ services:
       # opc-plc doesn't expose an HTTP health endpoint by default; use a TCP
       # probe via a shell the base image ships with. The fixture does its own
       # TCP probe but healthcheck surfaces status in `docker ps` for humans.
-      test: ["CMD-SHELL", "netstat -an | grep -q ':50000.*LISTEN' || exit 1"]
+      # #817: bash's /dev/tcp, NOT netstat — the image ships no netstat, so the old
+      # `netstat -an | grep` check left the container permanently "unhealthy" (same fix as nat/, 27302314).
+      test: ["CMD", "bash", "-c", "exec 3<>/dev/tcp/127.0.0.1/50000"]
       interval: 5s
       timeout: 2s
       retries: 10