diff --git a/tests/data/token_indexers/test_single_id_token_indexer.py b/tests/data/token_indexers/test_single_id_token_indexer.py
index 1684c6b85086562d3f9ead4d6e806518e927d466..65ea3d7c4d37ebd01f39e50938ad46fb8e30797d 100644
--- a/tests/data/token_indexers/test_single_id_token_indexer.py
+++ b/tests/data/token_indexers/test_single_id_token_indexer.py
@@ -1,8 +1,8 @@
-import unittest
 import os
+import unittest
 
 from combo.data import SingleIdTokenIndexer, Token
-from combo.data.vocabulary import match_namespace, Vocabulary
+from combo.data.vocabulary import Vocabulary
 
 
 class VocabularyTest(unittest.TestCase):