1 files changed, 21 insertions, 0 deletions
diff --git a/tests/test_ext_duration.py b/tests/test_ext_duration.py
new file mode 100644
index 000000000..65ea1eef7
--- /dev/null
+++ b/tests/test_ext_duration.py
@@ -0,0 +1,21 @@
+"""
+    test_ext_duration
+    ~~~~~~~~~~~~~~~~~
+
+    Test sphinx.ext.duration extension.
+
+    :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+import pytest
+
+
+@pytest.mark.sphinx('dummy', testroot='basic',
+                    confoverrides={'extensions': ['sphinx.ext.duration']})
+def test_githubpages(app, status, warning):
+    app.build()
+
+    assert 'slowest reading durations' in status.getvalue()
+    assert re.search('\\d+\\.\\d{3} index\n', status.getvalue())