Added test for --markdown-linebreak-ext and --chars together
diff --git a/tests/trailing_whitespace_fixer_test.py b/tests/trailing_whitespace_fixer_test.py
index ec4c918..97f9aef 100644
--- a/tests/trailing_whitespace_fixer_test.py
+++ b/tests/trailing_whitespace_fixer_test.py
@@ -94,3 +94,11 @@
path.write('\ta \t\n')
ret = main([path.strpath, '--chars', ' '])
assert ret == 0
+
+
+def test_markdown_with_custom_charset(tmpdir):
+ path = tmpdir.join('file.md')
+ path.write('\ta \t \n')
+ ret = main([path.strpath, '--chars', ' ', '--markdown-linebreak-ext', '*'])
+ assert ret == 1
+ assert path.read() == '\ta \t \n'
