diff --git a/backend/tests/ops/test_3078_alert_topic.py b/backend/tests/ops/test_3078_alert_topic.py
index 0daa4f5a..afb4cc5a 100644
--- a/backend/tests/ops/test_3078_alert_topic.py
+++ b/backend/tests/ops/test_3078_alert_topic.py
@@ -141,7 +141,11 @@ def test_watchdog_receiver_without_secret_has_no_configs_and_parses() -> None:
 
 def test_watchdog_receiver_with_secret_gets_webhook() -> None:
     """Секрет задан — Watchdog реально пингует внешний deadman-приёмник."""
-    block = '    webhook_configs:\n      - url: "https://hc-ping.com/dummy"\n        send_resolved: false'
+    block = (
+        "    webhook_configs:\n"
+        '      - url: "https://hc-ping.com/dummy"\n'
+        "        send_resolved: false"
+    )
     cfg = _render(INFRA_TOPIC_LINE, watchdog_ping_block=block)
     receivers = {r["name"]: r for r in cfg["receivers"]}
     hooks = receivers["watchdog-ping"].get("webhook_configs") or []