diff --git a/nbval-filter-mpldeprecation.patch b/nbval-filter-mpldeprecation.patch
new file mode 100644
index 0000000..fff7e88
--- /dev/null
+++ b/nbval-filter-mpldeprecation.patch
@@ -0,0 +1,32 @@
+Index: nbval-0.9.6/tests/ipynb-test-samples/test-latex-pass-correctouput.ipynb
+===================================================================
+--- nbval-0.9.6.orig/tests/ipynb-test-samples/test-latex-pass-correctouput.ipynb
++++ nbval-0.9.6/tests/ipynb-test-samples/test-latex-pass-correctouput.ipynb
+@@ -37,6 +37,9 @@
+     }
+    ],
+    "source": [
++    "import warnings\n",
++    "from matplotlib import MatplotlibDeprecationWarning\n",
++    "warnings.filterwarnings(\"ignore\", category=MatplotlibDeprecationWarning)\n",
+     "x**2 + y**3"
+    ]
+   }
+Index: nbval-0.9.6/tests/latex-example.ipynb
+===================================================================
+--- nbval-0.9.6.orig/tests/latex-example.ipynb
++++ nbval-0.9.6/tests/latex-example.ipynb
+@@ -15,6 +15,13 @@
+    },
+    "outputs": [],
+    "source": [
++    "try:\n",
++    "    import warnings\n",
++    "    from matplotlib import MatplotlibDeprecationWarning\n",
++    "    warnings.filterwarnings(\"ignore\", category=MatplotlibDeprecationWarning)\n",
++    "except ImportError:\n",
++    "    # no matplotlib, no problem\n",
++    "    pass\n",
+     "import sympy\n",
+     "sympy.init_printing()\n",
+     "x, y = sympy.symbols([\"x\", \"y\"])"
diff --git a/python-nbval.changes b/python-nbval.changes
index 4bd7eba..6548f9b 100644
--- a/python-nbval.changes
+++ b/python-nbval.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Apr 14 13:53:04 UTC 2021 - Ben Greiner <code@bnavigator.de>
+
+-  Add nbval-filter-mpldeprecation.patch for new Matplotlib 3.4
+   deprecation warnings -- gh#computationalmodelling/nbval#167
+
 -------------------------------------------------------------------
 Fri Feb 26 22:34:46 UTC 2021 - Ben Greiner <code@bnavigator.de>
 
diff --git a/python-nbval.spec b/python-nbval.spec
index ef50191..39848a7 100644
--- a/python-nbval.spec
+++ b/python-nbval.spec
@@ -26,6 +26,8 @@ License:        BSD-3-Clause
 Group:          Development/Languages/Python
 URL:            https://github.com/computationalmodelling/nbval
 Source:         https://files.pythonhosted.org/packages/source/n/nbval/nbval-%{version}.tar.gz
+# PATCH-FIX-UPSTREAM nbval-filter-mpldeprecation.patch -- gh#computationalmodelling/nbval#167
+Patch0:         nbval-filter-mpldeprecation.patch
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
@@ -77,7 +79,7 @@ Each cell is taken as a test, a cell that doesn't reproduce the
 expected output will fail.
 
 %prep
-%setup -q -n nbval-%{version}
+%autosetup -p1 -n nbval-%{version}
 sed -i 's/\r$//' README.md
 
 %build