From 8cae0962995d8fc83050b7dd9b739860acd94d3c 2023-08-07 02:20:18
From: Thomas A Caswell <tcaswell@gmail.com>
Date: 2023-08-07 02:20:18
Subject: [PATCH] TST: do not use deprecated and removed mpl backend name in test

Qt4 support is no longer a thing.

---

diff --git a/IPython/core/tests/test_pylabtools.py b/IPython/core/tests/test_pylabtools.py
index dd1a0ff..378e1a5 100644
--- a/IPython/core/tests/test_pylabtools.py
+++ b/IPython/core/tests/test_pylabtools.py
@@ -173,8 +173,8 @@ class TestPylabSwitch(object):
         # Save rcParams since they get modified
         self._saved_rcParams = matplotlib.rcParams
         self._saved_rcParamsOrig = matplotlib.rcParamsOrig
-        matplotlib.rcParams = dict(backend='Qt4Agg')
-        matplotlib.rcParamsOrig = dict(backend='Qt4Agg')
+        matplotlib.rcParams = dict(backend='QtAgg')
+        matplotlib.rcParamsOrig = dict(backend='QtAgg')
 
         # Mock out functions
         self._save_am = pt.activate_matplotlib