diff --git a/fix-test-avoid-duplicates.patch b/fix-test-avoid-duplicates.patch
new file mode 100644
index 0000000000000000000000000000000000000000..d808892868dfcb30596bcb9a0c6c8f63a5e45d32
--- /dev/null
+++ b/fix-test-avoid-duplicates.patch
@@ -0,0 +1,22 @@
+diff -Naur mailman-3.3.8.old/src/mailman/handlers/avoid_duplicates.py mailman-3.3.8/src/mailman/handlers/avoid_duplicates.py
+--- mailman-3.3.8.old/src/mailman/handlers/avoid_duplicates.py	2024-11-21 18:16:07.577599400 +0800
++++ mailman-3.3.8/src/mailman/handlers/avoid_duplicates.py	2024-11-21 18:16:22.776160000 +0800
+@@ -113,7 +113,3 @@
+                 newrecips.add(r)
+         # Set the new list of recipients.  XXX recips should always be a set.
+         msgdata['recipients'] = list(newrecips)
+-        # RFC 2822 specifies zero or one CC header
+-        del msg['cc']
+-        if cc_addresses:
+-            msg['CC'] = COMMASPACE.join(cc_addresses.values())
+diff -Naur mailman-3.3.8.old/src/mailman/handlers/docs/avoid-duplicates.rst mailman-3.3.8/src/mailman/handlers/docs/avoid-duplicates.rst
+--- mailman-3.3.8.old/src/mailman/handlers/docs/avoid-duplicates.rst	2024-11-21 18:16:07.474111000 +0800
++++ mailman-3.3.8/src/mailman/handlers/docs/avoid-duplicates.rst	2024-11-21 18:18:04.372763800 +0800
+@@ -96,6 +96,7 @@
+     ['bperson@example.com']
+     >>> print(msg.as_string())
+     From: Claire Person <cperson@example.com>
++    CC: aperson@example.com
+     <BLANKLINE>
+     Something of great import.
+     <BLANKLINE>
diff --git a/mailman.spec b/mailman.spec
index b0097e397909ab42d84a7cb1f2894b762e385a31..dd6defd373ed4ff9d4106c79a1880cb369d90cd6 100644
--- a/mailman.spec
+++ b/mailman.spec
@@ -7,7 +7,7 @@
 
 Name:                mailman
 Version:             3.3.8
-Release:             2
+Release:             3
 Epoch:               3
 Summary:             The GNU mailing list manager
 License:             GPLv3
@@ -21,6 +21,7 @@ Source5:             mailman3-digests.service
 Source6:             mailman3-digests.timer
 Patch0001:           mailman-subject-prefix.patch
 Patch0002:           mailman-use-either-importlib_resources-or-directly-importlib.patch
+Patch0003:           fix-test-avoid-duplicates.patch
 BuildArch:           noarch
 BuildRequires:       glibc-langpack-en
 BuildRequires:       python%{python3_pkgversion}-devel >= 3.5 python%{python3_pkgversion}-setuptools
@@ -205,6 +206,9 @@ done
 %{_datadir}/selinux/*/mailman3.pp
 
 %changelog
+* Thu Nov 21 2024 zhangxianjun <zhangxianjun@kylinos.cn> - 3:3.3.8-3
+- fix check error in  test_cc_with_header_instance
+
 * Mon Dec 25 2023 wangkai <13474090681@163.com> - 3:3.3.8-2
 - Fix install error due to flufl.i18n,flufl.lock upgrade