diff --git a/borgmatic/config/credential.py b/borgmatic/config/credential.py
index 2c1621de..ccec7ded 100644
--- a/borgmatic/config/credential.py
+++ b/borgmatic/config/credential.py
@@ -1,6 +1,5 @@
 import borgmatic.hooks.dispatch
 
-
 UNSPECIFIED = object()
 
 
diff --git a/tests/unit/config/test_credential.py b/tests/unit/config/test_credential.py
index 378bc18b..f6e16b20 100644
--- a/tests/unit/config/test_credential.py
+++ b/tests/unit/config/test_credential.py
@@ -16,7 +16,7 @@ def test_resolve_credentials_passes_through_string_without_credential_tag():
 def test_resolve_credentials_passes_through_none():
     flexmock(module.borgmatic.hooks.dispatch).should_receive('call_hook').never()
 
-    assert module.resolve_credentials(config=flexmock(), item=None) == None
+    assert module.resolve_credentials(config=flexmock(), item=None) is None
 
 
 def test_resolve_credentials_with_invalid_credential_tag_raises():