diff --git a/.github/workflows/all_test3.yaml b/.github/workflows/all_test3.yaml
index 90d7818..469fc78 100644
--- a/.github/workflows/all_test3.yaml
+++ b/.github/workflows/all_test3.yaml
@@ -69,6 +69,30 @@ jobs:
         run: |
           docker compose -f docker-compose-dev.yaml down || true
 
+      - name: Force remove old containers and network
+        run: |
+          docker ps --filter "network=hub-network" -aq | xargs -r docker rm -f || true
+
+          docker network rm hub-network || true
+
+          docker network ls
+
+      - name: Patch docker-compose-dev.yaml to set network MTU
+        run: |
+          echo "patching docker-compose-dev.yaml to set MTU=1400"
+          tmpfile=$(mktemp)
+          awk '
+            /driver: bridge/ {
+              print $0
+              print "    driver_opts:"
+              print "      com.docker.network.driver.mtu: 1400"
+              next
+            }
+            { print $0 }
+          ' docker-compose-dev.yaml > "$tmpfile"
+          mv "$tmpfile" docker-compose-dev.yaml
+          tail -n 10 docker-compose-dev.yaml
+
       - name: Start docker-compose services
         env:
           DOCKER_BUILDKIT: 1