From 6bc61b711bb0129ee02ac463fbd8fb09fdea587d Mon Sep 17 00:00:00 2001
From: Danny Lin <danny0838@gmail.com>
Date: Wed, 18 Jun 2025 01:12:50 +0800
Subject: [PATCH 1/3] Remove unneeded `zlib` dependency for testing

`zipfile.crc32` is internally `zlib.crc32` and fallbacks
to `binacsii.crc32` when `zlib.crc32` is not available.
Both of them do the same task.

`create_zipfile_with_extra_data` only calls `crc32` and
does not actually require the decompression method provided
by `zlib`.  Use `zipfile.crc32` rather than `zlib.crc32` to
allow the test to run on platforms without `zlib` support.
---
 Lib/test/test_zipfile/test_core.py | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/Lib/test/test_zipfile/test_core.py b/Lib/test/test_zipfile/test_core.py
index c0f3efaf0921da..4f20209927e7b3 100644
--- a/Lib/test/test_zipfile/test_core.py
+++ b/Lib/test/test_zipfile/test_core.py
@@ -4089,8 +4089,7 @@ def create_zipfile_with_extra_data(self, filename, extra_data_name):
             tag_for_unicode_path = b'\x75\x70'
             version_of_unicode_path = b'\x01'
 
-            import zlib
-            filename_crc = struct.pack('<L', zlib.crc32(filename_encoded))
+            filename_crc = struct.pack('<L', zipfile.crc32(filename_encoded))
 
             extra_data = version_of_unicode_path + filename_crc + extra_data_name
             tsize = len(extra_data).to_bytes(2, 'little')
@@ -4100,19 +4099,16 @@ def create_zipfile_with_extra_data(self, filename, extra_data_name):
             # add the file to the ZIP archive
             zf.writestr(zip_info, b'Hello World!')
 
-    @requires_zlib()
     def test_read_zipfile_containing_unicode_path_extra_field(self):
         self.create_zipfile_with_extra_data("이름.txt", "이름.txt".encode("utf-8"))
         with zipfile.ZipFile(TESTFN, "r") as zf:
             self.assertEqual(zf.filelist[0].filename, "이름.txt")
 
-    @requires_zlib()
     def test_read_zipfile_warning(self):
         self.create_zipfile_with_extra_data("이름.txt", b"")
         with self.assertWarns(UserWarning):
             zipfile.ZipFile(TESTFN, "r").close()
 
-    @requires_zlib()
     def test_read_zipfile_error(self):
         self.create_zipfile_with_extra_data("이름.txt", b"\xff")
         with self.assertRaises(zipfile.BadZipfile):

From e1f43deaf0ab2d91b0226f6402af9ea946876051 Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Sun, 21 Jun 2026 17:28:07 +0000
Subject: [PATCH 2/3] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst    | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst

diff --git a/Misc/NEWS.d/next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst b/Misc/NEWS.d/next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst
new file mode 100644
index 00000000000000..e71bfb2b1342bc
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst
@@ -0,0 +1 @@
+Remove unneeded ``zlib`` dependency in some ``zipfile`` tests.

From aa214763c7aecfa33274701d9c18b2a019765b42 Mon Sep 17 00:00:00 2001
From: Danny Lin <danny0838@gmail.com>
Date: Mon, 22 Jun 2026 08:36:35 +0800
Subject: [PATCH 3/3] =?UTF-8?q?Revert=20"=F0=9F=93=9C=F0=9F=A4=96=20Added?=
 =?UTF-8?q?=20by=20blurb=5Fit."?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This reverts commit e1f43deaf0ab2d91b0226f6402af9ea946876051.
---
 .../next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst    | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Misc/NEWS.d/next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst

diff --git a/Misc/NEWS.d/next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst b/Misc/NEWS.d/next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst
deleted file mode 100644
index e71bfb2b1342bc..00000000000000
--- a/Misc/NEWS.d/next/Tests/2026-06-21-17-28-00.gh-issue-151866.i3ZXyd.rst
+++ /dev/null
@@ -1 +0,0 @@
-Remove unneeded ``zlib`` dependency in some ``zipfile`` tests.