From 0dfefca8f753168a9f53eb06919bd0095e77de3b Mon Sep 17 00:00:00 2001
From: "Kacper Kowalik (Xarthisius)" <xarthisius.kk@gmail.com>
Date: Sun, 19 Jul 2020 10:07:21 -0500
Subject: [PATCH] Remove a bazillion of MatplotlibDeprecationWarnings

---
 yt/funcs.py                         | 10 ++++++----
 yt/visualization/base_plot_types.py |  4 +++-
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/yt/funcs.py b/yt/funcs.py
index c69ff1cfdd7..659b507c42e 100644
--- a/yt/funcs.py
+++ b/yt/funcs.py
@@ -18,6 +18,7 @@
 import urllib.parse
 import urllib.request
 import warnings
+from distutils.version import LooseVersion
 from functools import wraps
 from math import ceil, floor
 from numbers import Number as numeric_type
@@ -1266,10 +1267,11 @@ def matplotlib_style_context(style_name=None, after_reset=False):
     available, returns a dummy context manager.
     """
     if style_name is None:
-        style_name = {
-            "mathtext.fontset": "cm",
-            "mathtext.fallback_to_cm": True,
-        }
+        style_name = {"mathtext.fontset": "cm"}
+        if LooseVersion(matplotlib.__version__) >= LooseVersion("3.3.0"):
+            style_name["mathtext.fallback"] = "cm"
+        else:
+            style_name["mathtext.fallback_to_cm"] = True
     try:
         import matplotlib.style
 
diff --git a/yt/visualization/base_plot_types.py b/yt/visualization/base_plot_types.py
index 4b64ac2f130..4bfc142857a 100644
--- a/yt/visualization/base_plot_types.py
+++ b/yt/visualization/base_plot_types.py
@@ -134,7 +134,9 @@ def save(self, name, mpl_kwargs=None, canvas=None):
 
         if mpl_kwargs is None:
             mpl_kwargs = {}
-        if "papertype" not in mpl_kwargs:
+        if "papertype" not in mpl_kwargs and LooseVersion(
+            matplotlib.__version__
+        ) < LooseVersion("3.3.0"):
             mpl_kwargs["papertype"] = "auto"
 
         suffix = get_image_suffix(name)