diff --git a/Jenkinsfile.backend-docker b/Jenkinsfile.backend-docker
index 7a0787a..f130caa 100644
--- a/Jenkinsfile.backend-docker
+++ b/Jenkinsfile.backend-docker
@@ -138,10 +138,11 @@ pipeline {
                       exit 1
                     fi
 
+                    host_port=$((18080 + BUILD_NUMBER % 1000))
                     $DOCKER_CMD run --detach \
                       --name "$SMOKE_APP" \
                       --network "$SMOKE_NETWORK" \
-                      --publish 127.0.0.1::8080 \
+                      --publish "127.0.0.1:${host_port}:8080" \
                       --env ASPNETCORE_ENVIRONMENT=Production \
                       --env "ConnectionStrings__Default=Server=$SMOKE_MYSQL;Port=3306;Database=jizhi_smoke;User=jizhi;Password=jizhi-smoke-password" \
                       --env Jwt__Secret=jizhi-smoke-jwt-secret-at-least-32-characters \
@@ -153,8 +154,6 @@ pipeline {
                       --env "Build__Version=$IMMUTABLE_TAG" \
                       "$IMAGE_REF" >/dev/null
 
-                    host_port=$($DOCKER_CMD port "$SMOKE_APP" 8080/tcp | sed -n 's/.*://p' | head -n 1)
-                    test -n "$host_port"
                     app_ready=0
                     for attempt in $(seq 1 90); do
                       if curl --fail --silent --show-error \