1 files changed, 23 insertions, 0 deletions
diff --git a/tests/test_build_htmlhelp.py b/tests/test_build_htmlhelp.py
new file mode 100644
index 000000000..6eb7e3689
--- /dev/null
+++ b/tests/test_build_htmlhelp.py
@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+"""
+    test_build_htmlhelp
+    ~~~~~~~~~~~~~~~~~~~
+
+    Test the HTML Help builder and check output against XPath.
+
+    :copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import pytest
+
+
+@pytest.mark.sphinx('htmlhelp', testroot='basic')
+def test_default_htmlhelp_file_suffix(app, warning):
+    assert app.builder.out_suffix == '.html'
+
+
+@pytest.mark.sphinx('htmlhelp', testroot='basic',
+                    confoverrides={'htmlhelp_file_suffix': '.htm'})
+def test_htmlhelp_file_suffix(app, warning):
+    assert app.builder.out_suffix == '.htm'