test: retry flaky webhook E2E test on platform-side timeouts

pyproject.toml

@@ -78,6 +78,7 @@ dev = [
     "pytest-asyncio<2.0.0",
     "pytest-cov<8.0.0",
     "pytest-httpserver<2.0.0",
+    "pytest-rerunfailures<17.0.0",
     "pytest-timeout<3.0.0",
     "pytest-xdist<4.0.0",
     "pytest<10.0.0",

tests/e2e/test_actor_api_helpers.py

@@ -4,6 +4,8 @@
 import json
 from typing import TYPE_CHECKING
 
+import pytest
+
 from apify_shared.consts import ActorPermissionLevel
 from crawlee._utils.crypto import crypto_random_object_id
 
@@ -387,6 +389,9 @@ async def main() -> None:
     assert reboot_counter['value'] == 2
 
 
+# Flaky: the server Actor blocks until the platform delivers the client's `ACTOR_RUN_SUCCEEDED` webhook; when
+# delivery is delayed past the run timeout, the run ends as `TIMED-OUT`. Platform-side, outside our control, so retry.
+@pytest.mark.flaky(reruns=3)
 async def test_actor_adds_webhook_and_receives_event(
     make_actor: MakeActorFunction,
     run_actor: RunActorFunction,