diff --git a/tests/test_extension_memusage.py b/tests/test_extension_memusage.py
index 43770ba76..195d270de 100644
--- a/tests/test_extension_memusage.py
+++ b/tests/test_extension_memusage.py
@@ -2,11 +2,9 @@ from __future__ import annotations
 
 import logging
 import sys
-from typing import Any
 
 import pytest
 
-from scrapy import signals
 from scrapy.extensions import memusage as memusage_mod
 from scrapy.extensions.memusage import MemoryUsage
 from scrapy.spiders import Spider
@@ -55,21 +53,10 @@ async def test_memusage_limit_closes_spider_with_reason_and_error_log(
 
     # Avoid background LoopingCall that can log after the test finishes.
     monkeypatch.setattr(memusage_mod, "create_looping_call", OneShotLoop)
-
-    state = {"high": False}
-
-    def fake_vsz(self: Any) -> int:
-        return 250 * MB if state["high"] else 5 * MB
-
-    monkeypatch.setattr(MemoryUsage, "get_virtual_size", fake_vsz)
+    monkeypatch.setattr(MemoryUsage, "get_virtual_size", lambda _: 250 * MB)
 
     crawler = get_crawler(spidercls=_LoopSpider, settings_dict=settings)
 
-    def on_opened(spider):
-        state["high"] = True
-
-    crawler.signals.connect(on_opened, signal=signals.spider_opened)
-
     with caplog.at_level(logging.ERROR, logger="scrapy.extensions.memusage"):
         await crawler.crawl_async(url="data:,", loops=100)