diff --git a/t/tokenization.t b/t/tokenization.t
index 932407b..5332196 100644
--- a/t/tokenization.t
+++ b/t/tokenization.t
@@ -41,6 +41,8 @@
 $cons->reset->tokenize("... Der");
 is_deeply($cons, [0,1,1,2,2,3,4,7]);
 
+# TODO:
+#   bug: '.' is not tokenized
 $cons->reset->tokenize(".Der");
 is_deeply($cons, [1,4]);