diff --git a/src/rougail/user_data_environment/annotator.py b/src/rougail/user_data_environment/annotator.py
index d0e32cb..a9592bb 100644
--- a/src/rougail/user_data_environment/annotator.py
+++ b/src/rougail/user_data_environment/annotator.py
@@ -8,12 +8,12 @@ This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.
-        
+
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
-            
+
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
diff --git a/src/rougail/user_data_environment/config.py b/src/rougail/user_data_environment/config.py
index 9c84ec1..daf604d 100644
--- a/src/rougail/user_data_environment/config.py
+++ b/src/rougail/user_data_environment/config.py
@@ -21,7 +21,6 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 """
 
-
 from .i18n import _
 
 
diff --git a/src/rougail/user_data_environment/data.py b/src/rougail/user_data_environment/data.py
index 3cb6c59..99636e0 100644
--- a/src/rougail/user_data_environment/data.py
+++ b/src/rougail/user_data_environment/data.py
@@ -53,7 +53,9 @@ class RougailUserDataEnvironment:
             self.with_secrets = True
         self.custom_separator = rougailconfig["environment.custom_separator"]
         if not rougailconfig["main_namespace"]:
-            self.default_environment_name = rougailconfig["environment.default_environment_name"]
+            self.default_environment_name = rougailconfig[
+                "environment.default_environment_name"
+            ]
         self.errors = []
         self.warnings = []
 
@@ -101,7 +103,7 @@ class RougailUserDataEnvironment:
     def get_correct_envs(self):
         for envvar, envval in os.environ.items():
             if self.custom_separator:
-                envvar = envvar.replace(self.custom_separator, '.')
+                envvar = envvar.replace(self.custom_separator, ".")
                 for prefix in self.prefixes:
                     if envvar.startswith(prefix):
                         yield envvar, envval
diff --git a/src/rougail/user_data_environment/i18n.py b/src/rougail/user_data_environment/i18n.py
index 381e2cf..58104f5 100644
--- a/src/rougail/user_data_environment/i18n.py
+++ b/src/rougail/user_data_environment/i18n.py
@@ -20,8 +20,9 @@ from gettext import translation
 from pathlib import Path
 
 t = translation(
-    "rougail_user_data_environment", str(Path(__file__).parent / "locale"), fallback=True
+    "rougail_user_data_environment",
+    str(Path(__file__).parent / "locale"),
+    fallback=True,
 )
 
 _ = t.gettext
-