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 1/3] 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

From ae2376a93dd0d9c250cada00eb92da3db877e0a5 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Wed, 26 Nov 2025 11:53:26 -0800
Subject: [PATCH 2/3] Remove redundant condition

---
 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 34ca256a5d1ea..ba210b8b635fd 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 any(x is NaT for x in exp)
+        assert exp[key] is NaT
         return exp
 
     @pytest.fixture

From f3d98e929af652a06d0f751393f499f93f82fe74 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Mon, 1 Dec 2025 11:13:03 -0800
Subject: [PATCH 3/3] Revert "Remove redundant condition"

This reverts commit ae2376a93dd0d9c250cada00eb92da3db877e0a5.
---
 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 37ab9bca13156..886c80c0cac6e 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
+        assert exp[key] is NaT or any(x is NaT for x in exp)
         return exp
 
     @pytest.fixture