diff --git a/app/io/writer.py b/app/io/writer.py
index d726a2a..f7065f9 100644
--- a/app/io/writer.py
+++ b/app/io/writer.py
@@ -1,6 +1,5 @@
 from abc import ABCMeta, abstractmethod
 from pathlib import Path
-from typing import Callable
 
 from app import utils
 
diff --git a/app/tests/utils.py b/app/tests/utils.py
index 910e365..9e19ade 100644
--- a/app/tests/utils.py
+++ b/app/tests/utils.py
@@ -1,4 +1,4 @@
-from app.config import ConverterOptions, Configurator
+from app.config import Configurator, ConverterOptions
 
 
 def make_fake_configurator(converter: str, converter_options: ConverterOptions):
diff --git a/app/tests/utils_test.py b/app/tests/utils_test.py
index a1fc872..420360c 100644
--- a/app/tests/utils_test.py
+++ b/app/tests/utils_test.py
@@ -1,10 +1,7 @@
 import pytest
 
-from app.utils import (
-    guard_against_none,
-    guard_against_none_or_empty_str,
-    key_error_silence,
-)
+from app.utils import (guard_against_none, guard_against_none_or_empty_str,
+                       key_error_silence)
 
 
 def test_key_error_silence():