From 54e704188b3d6d97ca6c17dd50c11d8541c38f63 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Mon, 10 Nov 2025 17:04:10 -0800
Subject: [PATCH] TST: Fix assertion for TestSetitemNAPeriodDtype::expected

---
 pandas/tests/series/indexing/test_setitem.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pandas/tests/series/indexing/test_setitem.py b/pandas/tests/series/indexing/test_setitem.py
index f894005296781..34ca256a5d1ea 100644
--- a/pandas/tests/series/indexing/test_setitem.py
+++ b/pandas/tests/series/indexing/test_setitem.py
@@ -1025,7 +1025,7 @@ class TestSetitemNAPeriodDtype(SetitemCastingEquivalents):
     def expected(self, key):
         exp = Series(period_range("2000-01-01", periods=10, freq="D"))
         exp._values.view("i8")[key] = NaT._value
-        assert exp[key] is NaT or all(x is NaT for x in exp[key])
+        assert exp[key] is NaT or any(x is NaT for x in exp)
         return exp
 
     @pytest.fixture