diff --git a/test/test_library.py b/test/test_library.py
index c36e95a5e7..1d50aff4a9 100644
--- a/test/test_library.py
+++ b/test/test_library.py
@@ -589,6 +589,10 @@ def test_title_case_variable(self):
         self._setf(u'%title{$title}')
         self._assert_dest(b'/base/The Title')
 
+    def test_title_case_variable(self):
+        self._setf(u'%title{I can\'t}')
+        self._assert_dest(b'/base/I Can\'t')
+
     def test_asciify_variable(self):
         self._setf(u'%asciify{ab\xa2\xbdd}')
         self._assert_dest(b'/base/abC_ 1_2 d')