diff --git a/spacy/en/language_data.py b/spacy/en/language_data.py
index 1bce0f87a..f63b88b24 100644
--- a/spacy/en/language_data.py
+++ b/spacy/en/language_data.py
@@ -2014,7 +2014,7 @@ self_map = [
     "Wis.",
     "x.",
     "y.",
-    "z.",
+    "z."
 ]
 
 overlap = set(TOKENIZER_EXCEPTIONS.keys()).intersection(set(self_map))