From 22d23f34255c0fb6a3d2ce764dbb1685c8f5b710 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Wed, 22 Nov 2023 08:13:26 -1000
Subject: [PATCH] Backport PR #56109: CI: Ignore EncodingWarning in
 assert_produces_warning

---
 pandas/_testing/_warnings.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pandas/_testing/_warnings.py b/pandas/_testing/_warnings.py
index 11cf60ef36a9c..c1c70605d9648 100644
--- a/pandas/_testing/_warnings.py
+++ b/pandas/_testing/_warnings.py
@@ -13,6 +13,8 @@
 )
 import warnings
 
+from pandas.compat import PY311
+
 if TYPE_CHECKING:
     from collections.abc import (
         Generator,
@@ -179,6 +181,11 @@ def _assert_caught_no_extra_warnings(
                 # due to these open files.
                 if any("matplotlib" in mod for mod in sys.modules):
                     continue
+            if PY311 and actual_warning.category == EncodingWarning:
+                # EncodingWarnings are checked in the CI
+                # pyproject.toml errors on EncodingWarnings in pandas
+                # Ignore EncodingWarnings from other libraries
+                continue
             extra_warnings.append(
                 (
                     actual_warning.category.__name__,