diff --git a/tests/test_tokenizers.py b/tests/test_tokenizers.py
index 578bf86..6c993b3 100644
--- a/tests/test_tokenizers.py
+++ b/tests/test_tokenizers.py
@@ -13,6 +13,8 @@ def test_tokenize(self):
         for i, token in enumerate(tokens):
             self.assertEqual(token, expected[i])
 
+        self.assertEqual(tokenizer.dropped, 6)
+
 class TestCanonical(unittest.TestCase):
     def test_tokenize(self):
         tokenizer = tokenizers.Canonical(tokenizers.Kmer(k=6))
@@ -33,4 +35,7 @@ def test_tokenize(self):
         expected = ['CGGT', 'TCAG', 'TAAT']
 
         for i, token in enumerate(tokens):
-            self.assertEqual(token, expected[i])
\ No newline at end of file
+            self.assertEqual(token, expected[i])
+
+        self.assertEqual(tokenizer.dropped, 1)
+        
\ No newline at end of file