diff --git a/src/_zkapauthorizer/config.py b/src/_zkapauthorizer/config.py
index 87a095620835dc5db374c001219755c72018a0b2..064ff52220e67080b6d3dd587b0fd94190b5ae09 100644
--- a/src/_zkapauthorizer/config.py
+++ b/src/_zkapauthorizer/config.py
@@ -23,10 +23,10 @@ try:
 except ImportError:
     pass
 
-from .lease_maintenance import LeaseMaintenanceConfig
-
 from allmydata.node import _Config
 
+from .lease_maintenance import LeaseMaintenanceConfig
+
 
 class _EmptyConfig(object):
     """
diff --git a/src/_zkapauthorizer/tests/test_plugin.py b/src/_zkapauthorizer/tests/test_plugin.py
index 6989cfa2eee03f7cb9ada51b826d82c464adca60..0e87c89cae5e7cb2f714f582e6f9dcc1f37d088d 100644
--- a/src/_zkapauthorizer/tests/test_plugin.py
+++ b/src/_zkapauthorizer/tests/test_plugin.py
@@ -48,9 +48,9 @@ from testtools.matchers import (
     Equals,
     HasLength,
     IsInstance,
+    Matcher,
     MatchesAll,
     MatchesStructure,
-    Matcher,
 )
 from testtools.twistedsupport import succeeded
 from twisted.internet.task import Clock