diff --git a/spacy/lang/ja/__init__.py b/spacy/lang/ja/__init__.py
index 2b2e26817..a25faec50 100644
--- a/spacy/lang/ja/__init__.py
+++ b/spacy/lang/ja/__init__.py
@@ -82,7 +82,7 @@ class JapaneseTokenizer(object):
 
         MeCab = try_mecab_import()
         self.tokenizer = MeCab.Tagger()
-        self.tokenizer.parseToNode('')  # see #2901
+        self.tokenizer.parseToNode("")  # see #2901
 
     def __call__(self, text):
         dtokens = detailed_tokens(self.tokenizer, text)