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\"])"