diff --git a/src/_zkapauthorizer/tests/foolscap.py b/src/_zkapauthorizer/tests/foolscap.py
index 52b745a6a0b50d154388b0a96aee3b3c20f59fb8..9cef79e99c4cdc687f55ff8d627a646f5036a508 100644
--- a/src/_zkapauthorizer/tests/foolscap.py
+++ b/src/_zkapauthorizer/tests/foolscap.py
@@ -43,6 +43,7 @@ class StubStorageServer(object):
     def set_implicit_slot_lease_renewal(self, enabled):
         pass
 
+
 def get_anonymous_storage_server():
     return StubStorageServer()
 
diff --git a/src/_zkapauthorizer/tests/test_storage_protocol.py b/src/_zkapauthorizer/tests/test_storage_protocol.py
index 74b3cadadc52787233b8565c4f037b4602aaf833..32e7e406380eaff0ce140f22b37db0cf394ae0a3 100644
--- a/src/_zkapauthorizer/tests/test_storage_protocol.py
+++ b/src/_zkapauthorizer/tests/test_storage_protocol.py
@@ -466,10 +466,15 @@ class ShareTests(TestCase):
         expected_leases = {}
         # Chop off the non-integer part of the expected values because share
         # files only keep integer precision.
-        expected_leases.update({sharenum: [int(when)] for sharenum in existing_sharenums})
-        expected_leases.update({
-            sharenum: [int(when + interval)] for sharenum in all_sharenums - existing_sharenums
-        })
+        expected_leases.update(
+            {sharenum: [int(when)] for sharenum in existing_sharenums}
+        )
+        expected_leases.update(
+            {
+                sharenum: [int(when + interval)]
+                for sharenum in all_sharenums - existing_sharenums
+            }
+        )
 
         self.assertThat(
             dict(get_lease_grant_times(self.anonymous_storage_server, storage_index)),