@@ -1008,9 +1008,10 @@ async def test_guard_uses_the_real_resolver() -> None:
     )
 
 
-async def test_timeouts_are_hard_coded(web: FakeWeb) -> None:
-    # Characterizes #4448: the page fetch uses a fixed 30s timeout and the
-    # robots.txt fetch uses httpx's 5s default; neither is configurable.
+async def test_default_timeouts(web: FakeWeb) -> None:
+    # With nothing configured the page fetch waits 30s and the robots.txt
+    # fetch uses httpx's 5s default. Only the page timeout is configurable
+    # (#4448; tests/test_timeout.py).
     web.add(ROBOTS, plain("", status=404))
     web.add(PAGE, plain("ok"))
     async with connect() as (session, _):
 
@@ -38,9 +38,11 @@
 
 @pytest.fixture(autouse=True)
 def no_timeout_env(monkeypatch: pytest.MonkeyPatch) -> None:
-    # A developer's own FETCH_TIMEOUT_MS must not leak into these tests, and
-    # monkeypatch restores whatever main() writes to the variable.
-    monkeypatch.delenv(TIMEOUT_ENV, raising=False)
+    # A developer's own FETCH_TIMEOUT_MS must not leak into these tests, nor
+    # what main() writes to it into later tests. setenv first: delenv of an
+    # absent variable records no undo, so main()'s write would survive.
+    monkeypatch.setenv(TIMEOUT_ENV, "")
+    monkeypatch.delenv(TIMEOUT_ENV)
 
 
 def recording_page(seen: list[dict[str, Any]]) -> Any: