diff --git a/gufe/tokenization.py b/gufe/tokenization.py
index 1f50fc90..2cead759 100644
--- a/gufe/tokenization.py
+++ b/gufe/tokenization.py
@@ -150,7 +150,6 @@ def __eq__(self, other):
     def __hash__(self):
         return hash(self.key)
 
-
     def _gufe_tokenize(self):
         """Return a list of normalized inputs for `gufe.base.tokenize`.