TST: switch order of tests

Perfer to run with Qt6 if available

Author: tacaswell

lib/matplotlib/tests/test_backend_qt.py

@@ -35,12 +35,12 @@ def qt_core(request):
 
 @pytest.mark.parametrize('backend', [
     # Note: the value is irrelevant; the important part is the marker.
-    pytest.param(
-        'Qt5Agg',
-        marks=pytest.mark.backend('Qt5Agg', skip_on_importerror=True)),
     pytest.param(
         'QtAgg',
         marks=pytest.mark.backend('QtAgg', skip_on_importerror=True)),
+    pytest.param(
+        'Qt5Agg',
+        marks=pytest.mark.backend('Qt5Agg', skip_on_importerror=True)),
 ])
 def test_fig_close(backend):
     # save the state of Gcf.figs