matplotlib
diff --git a/‎lib/matplotlib/tests/test_doc.py
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+34Lines changed: 34 additions & 0 deletions b/‎lib/matplotlib/tests/test_doc.py
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+34Lines changed: 34 additions & 0 deletions
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+import pytest
+
+
+def test_sphinx_gallery_example_header():
+    """
+    We have copied EXAMPLE_HEADER and modified it to include meta keywords.
+    This test monitors that the version we have copied is still the same as
+    the EXAMPLE_HEADER in sphinx-gallery. If sphinx-gallery changes its
+    EXAMPLE_HEADER, this test will start to fail. In that case, please update
+    the monkey-patching of EXAMPLE_HEADER in conf.py.
+    """
+    gen_rst = pytest.importorskip('sphinx_gallery.gen_rst')
+
+    EXAMPLE_HEADER = """
+.. DO NOT EDIT.
+.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
+.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
+.. "{0}"
+.. LINE NUMBERS ARE GIVEN BELOW.
+
+.. only:: html
+
+    .. note::
+        :class: sphx-glr-download-link-note
+
+        Click :ref:`here <sphx_glr_download_{1}>`
+        to download the full example code{2}
+
+.. rst-class:: sphx-glr-example-title
+
+.. _sphx_glr_{1}:
+
+"""
+    assert gen_rst.EXAMPLE_HEADER == EXAMPLE_HEADER