diff --git a/django_downloadview/middlewares.py b/django_downloadview/middlewares.py
index ef8f9c0..7b7b39c 100644
--- a/django_downloadview/middlewares.py
+++ b/django_downloadview/middlewares.py
@@ -145,7 +145,7 @@ def auto_configure_backend_factory(self):
             self.backend_factory = import_member(settings.DOWNLOADVIEW_BACKEND)
         except AttributeError:
             raise ImproperlyConfigured(
-                "SmartDownloadMiddleware requires " "settings.DOWNLOADVIEW_BACKEND"
+                "SmartDownloadMiddleware requires settings.DOWNLOADVIEW_BACKEND"
             )
 
     def auto_configure_backend_options(self):
@@ -155,7 +155,7 @@ def auto_configure_backend_options(self):
             options_list = copy.deepcopy(settings.DOWNLOADVIEW_RULES)
         except AttributeError:
             raise ImproperlyConfigured(
-                "SmartDownloadMiddleware requires " "settings.DOWNLOADVIEW_RULES"
+                "SmartDownloadMiddleware requires settings.DOWNLOADVIEW_RULES"
             )
         for key, options in enumerate(options_list):
             args = []
diff --git a/tests/api.py b/tests/api.py
index 713a5b0..e0223e1 100644
--- a/tests/api.py
+++ b/tests/api.py
@@ -141,5 +141,5 @@ def test_nginx_x_accel_redirect_global_settings(self):
         if missed_warnings:
             self.fail(
                 f"No DeprecationWarning raised about following settings: "
-                f'{", ".join(missed_warnings)}.'
+                f"{', '.join(missed_warnings)}."
             )