Description: Matplotlib 3.3 compatibility fixup

Author: Rebecca N. Palmer <rebecca_palmer@zoho.com>
Bug-Debian: https://bugs.debian.org/966393
Forwarded: no

--- a/pandas/tests/plotting/test_datetimelike.py
+++ b/pandas/tests/plotting/test_datetimelike.py
@@ -1465,7 +1465,7 @@ class TestTSPlot(TestPlotBase):
         s2.plot(ax=ax)
         s1.plot(ax=ax)
 
-    @pytest.mark.xfail(reason="GH9053 matplotlib does not use ax.xaxis.converter")
+    @pytest.mark.xfail(reason="GH9053 matplotlib does not use ax.xaxis.converter", strict=False)
     def test_add_matplotlib_datetime64(self):
         # GH9053 - ensure that a plot with PeriodConverter still understands
         # datetime64 data. This still fails because matplotlib overrides the