diff --git a/devops/production/bin/deploy.sh b/devops/production/bin/deploy.sh
index 76032eb..6ebeaf1 100755
--- a/devops/production/bin/deploy.sh
+++ b/devops/production/bin/deploy.sh
@@ -555,9 +555,9 @@ prepare_release() {
   sync_runtime_env_from_infisical
   ensure_private_directory "${ROOT_DIR}/data" 700
   ensure_private_directory "${ROOT_DIR}/data/releases" 700
-  docker_cmd network inspect "${EDGE_NETWORK}" >/dev/null \
+  docker_cmd network-exists "${EDGE_NETWORK}" >/dev/null \
     || fail "External Docker network ${EDGE_NETWORK} is missing"
-  docker_cmd network inspect "${DATA_NETWORK}" >/dev/null \
+  docker_cmd network-exists "${DATA_NETWORK}" >/dev/null \
     || fail "External Docker network ${DATA_NETWORK} is missing"
   docker_cmd inspect "${POSTGRES_CONTAINER}" >/dev/null \
     || fail "Shared PostgreSQL container is missing"
diff --git a/devops/production/bin/test_production_deploy_contract.py b/devops/production/bin/test_production_deploy_contract.py
new file mode 100644
index 0000000..aa20d3f
--- /dev/null
+++ b/devops/production/bin/test_production_deploy_contract.py
@@ -0,0 +1,18 @@
+import unittest
+from pathlib import Path
+
+
+DEPLOY_SCRIPT = Path(__file__).with_name("deploy.sh")
+
+
+class ProductionDeployContractTest(unittest.TestCase):
+    def test_uses_approved_network_diagnostics(self) -> None:
+        script = DEPLOY_SCRIPT.read_text(encoding="utf-8")
+
+        self.assertIn('docker_cmd network-exists "${EDGE_NETWORK}"', script)
+        self.assertIn('docker_cmd network-exists "${DATA_NETWORK}"', script)
+        self.assertNotIn("docker_cmd network inspect", script)
+
+
+if __name__ == "__main__":
+    unittest.main()