Actually add test patch

22979.patch

@@ -0,0 +1,38 @@
+From dc5b6e87b6f4e1817720ea5aea1110231aab5667 Mon Sep 17 00:00:00 2001
+From: Elliott Sales de Andrade <quantum.analyst@gmail.com>
+Date: Wed, 4 May 2022 20:41:01 -0400
+Subject: [PATCH] Skip additional backend tests on import error
+
+All the Qt tests in this file already do this, and the remaining one
+fails if running headless.
+---
+ lib/matplotlib/tests/test_backend_gtk3.py | 2 +-
+ lib/matplotlib/tests/test_backend_qt.py   | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/lib/matplotlib/tests/test_backend_gtk3.py b/lib/matplotlib/tests/test_backend_gtk3.py
+index 5442930d117f..937ddef5a13f 100644
+--- a/lib/matplotlib/tests/test_backend_gtk3.py
++++ b/lib/matplotlib/tests/test_backend_gtk3.py
+@@ -6,7 +6,7 @@
+ pytest.importorskip("matplotlib.backends.backend_gtk3agg")
+ 
+ 
+-@pytest.mark.backend("gtk3agg")
++@pytest.mark.backend("gtk3agg", skip_on_importerror=True)
+ def test_correct_key():
+     pytest.xfail("test_widget_send_event is not triggering key_press_event")
+ 
+diff --git a/lib/matplotlib/tests/test_backend_qt.py b/lib/matplotlib/tests/test_backend_qt.py
+index eee4e56536ec..61abf58ac84e 100644
+--- a/lib/matplotlib/tests/test_backend_qt.py
++++ b/lib/matplotlib/tests/test_backend_qt.py
+@@ -193,7 +193,7 @@ def test_other_signal_before_sigint(target, kwargs):
+     plt.figure()
+ 
+ 
+-@pytest.mark.backend('Qt5Agg')
++@pytest.mark.backend('Qt5Agg', skip_on_importerror=True)
+ def test_fig_sigint_override(qt_core):
+     from matplotlib.backends.backend_qt5 import _BackendQT5
+     # Create a figure