From 1a1a4457ada788eb9ceb7cd0abe7026c0b716f1c Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Tue, 30 Aug 2022 10:16:22 -0700
Subject: [PATCH] TST: Filter false positive matplotlib warning

---
 pandas/plotting/_matplotlib/core.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pandas/plotting/_matplotlib/core.py b/pandas/plotting/_matplotlib/core.py
index 0b6e5b346062a..7a469f9f19d80 100644
--- a/pandas/plotting/_matplotlib/core.py
+++ b/pandas/plotting/_matplotlib/core.py
@@ -1177,7 +1177,11 @@ def _plot_colorbar(self, ax: Axes, **kwds):
         # use the last one which contains the latest information
         # about the ax
         img = ax.collections[-1]
-        return self.fig.colorbar(img, ax=ax, **kwds)
+        with warnings.catch_warnings():
+            # https://github.com/matplotlib/matplotlib/issues/23614
+            # False positive deprecation warning until matplotlib=3.6
+            warnings.filterwarnings("ignore", "Auto-removal of grids")
+            return self.fig.colorbar(img, ax=ax, **kwds)
 
 
 class ScatterPlot(PlanePlot):