diff --git a/packtivity/statecontexts/posixfs_context.py b/packtivity/statecontexts/posixfs_context.py
index f5fd44c..b08ea94 100644
--- a/packtivity/statecontexts/posixfs_context.py
+++ b/packtivity/statecontexts/posixfs_context.py
@@ -117,9 +117,7 @@ def state_hash(self):
         return: SHA1 hash
         """
         # hash the upstream / input state
-        dep_checksums = [
-            dirhash(d, "sha1") for d in self.readonly if os.path.isdir(d)
-        ]
+        dep_checksums = [dirhash(d, "sha1") for d in self.readonly if os.path.isdir(d)]
 
         # hash out writing state
         state_checksums = [