diff --git a/scrapy/tests/test_utils_queue.py b/scrapy/tests/test_utils_queue.py
index 9a18abc72..2a16eeb0e 100644
--- a/scrapy/tests/test_utils_queue.py
+++ b/scrapy/tests/test_utils_queue.py
@@ -221,4 +221,4 @@ class LifoDiskQueueTest(LifoMemoryQueueTest):
         q = self.queue()
         q.pop()
         q.close()
-        self.assertLess(os.path.getsize(self.path), size)
+        assert os.path.getsize(self.path), size