diff --git a/tests/spellchecker_test.py b/tests/spellchecker_test.py
index c1cf86e..e648f3b 100644
--- a/tests/spellchecker_test.py
+++ b/tests/spellchecker_test.py
@@ -60,7 +60,7 @@ def test_word_usage_frequency(self):
         self.assertEqual(spell.word_usage_frequency('the'), num / denom)
 
     # deprecated!
-    @fail_after("0.6.3")
+    @fail_after("0.6.4")
     def test_word_probability_calc(self):
         ''' test the word probability calculation '''
         spell = SpellChecker()