diff --git a/doc/ldif2dot-0.1.py b/doc/ldif2dot-0.1.py
index 49baaaa1..f492bebf 100644
--- a/doc/ldif2dot-0.1.py
+++ b/doc/ldif2dot-0.1.py
@@ -43,7 +43,7 @@ class Element:
 
     def __repr__(self):
         """Returns a basic state dump."""
-        return 'Element' + str(self.index) + str(self.attributes)
+        return "Element" + str(self.index) + str(self.attributes)
 
     def add(self, line):
         """Adds a line of input to the object.
@@ -57,10 +57,10 @@ class Element:
         """
 
         def _valid(line):
-            return line and not line.startswith('#')
+            return line and not line.startswith("#")
 
         def _interesting(line):
-            return line != 'objectClass: top'
+            return line != "objectClass: top"
 
         if self.is_valid() and not _valid(line):
             return True
@@ -70,11 +70,11 @@ class Element:
 
     def is_valid(self):
         """Indicates whether a valid entry has been read."""
-        return len(self.attributes) != 0 and self.attributes[0].startswith('dn: ')
+        return len(self.attributes) != 0 and self.attributes[0].startswith("dn: ")
 
     def dn(self):
         """Returns the DN for this entry."""
-        if self.attributes[0].startswith('dn: '):
+        if self.attributes[0].startswith("dn: "):
             return self.attributes[0][4:]
         else:
             return None
@@ -86,12 +86,12 @@ class Element:
         Element objects) and returns a string which declares a DOT edge, or an
         empty string, if no parent was found.
         """
-        dn_components = self.dn().split(',')
+        dn_components = self.dn().split(",")
         for i in range(1, len(dn_components) + 1):
-            parent = ','.join(dn_components[i:])
+            parent = ",".join(dn_components[i:])
             if parent in dnmap:
-                return '  n%d->n%d\n' % (dnmap[parent].index, self.index)
-        return ''
+                return "  n%d->n%d\n" % (dnmap[parent].index, self.index)
+        return ""
 
     def dot(self, dnmap):
         """Returns a text representation of the node and perhaps its parent edge.
@@ -99,6 +99,7 @@ class Element:
         Args:
          - dnmap: dictionary mapping dn names to Element objects
         """
+
         def _format(attributes):
             result = [TITLE_ENTRY_TEMPALTE % attributes[0]]
 
@@ -107,7 +108,12 @@ class Element:
 
             return result
 
-        return TABLE_TEMPLATE % (self.index, '\n    '.join(_format(self.attributes)), self.edge(dnmap))
+        return TABLE_TEMPLATE % (
+            self.index,
+            "\n    ".join(_format(self.attributes)),
+            self.edge(dnmap),
+        )
+
 
 class Converter:
     """An LDIF to DOT converter."""
@@ -144,7 +150,11 @@ class Converter:
                 e = Element()
         if e.is_valid():
             self._append(e)
-        return (BASE_TEMPLATE % (name, ''.join([e.dot(self.dnmap) for e in self.elements])))
+        return BASE_TEMPLATE % (
+            name,
+            "".join([e.dot(self.dnmap) for e in self.elements]),
+        )
+
 
 BASE_TEMPLATE = """\
 strict digraph "%s" {
@@ -191,13 +201,13 @@ ENTRY_TEMPALTE = """\
 """
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     if len(sys.argv) > 2:
-        raise 'Expected at most one argument.'
+        raise "Expected at most one argument."
     elif len(sys.argv) == 2:
         name = sys.argv[1]
-        file = open(sys.argv[1], 'r')
+        file = open(sys.argv[1], "r")
     else:
-        name = '<stdin>'
+        name = "<stdin>"
         file = sys.stdin
     print(Converter().parse(file, name))
diff --git a/moulinette/actionsmap.py b/moulinette/actionsmap.py
index e5e9547b..6d36b252 100644
--- a/moulinette/actionsmap.py
+++ b/moulinette/actionsmap.py
@@ -107,7 +107,6 @@ class CommentParameter(_ExtraParameter):
 
 
 class AskParameter(_ExtraParameter):
-
     """
     Ask for the argument value if possible and needed.
 
@@ -146,7 +145,6 @@ class AskParameter(_ExtraParameter):
 
 
 class PasswordParameter(AskParameter):
-
     """
     Ask for the password argument value if possible and needed.
 
@@ -169,7 +167,6 @@ class PasswordParameter(AskParameter):
 
 
 class PatternParameter(_ExtraParameter):
-
     """
     Check if the argument value match a pattern.
 
@@ -222,7 +219,6 @@ class PatternParameter(_ExtraParameter):
 
 
 class RequiredParameter(_ExtraParameter):
-
     """
     Check if a required argument is defined or not.
 
@@ -262,7 +258,6 @@ extraparameters_list = [
 
 
 class ExtraArgumentParser:
-
     """
     Argument validator and parser for the extra parameters.
 
@@ -374,7 +369,6 @@ class ExtraArgumentParser:
 
 
 class ActionsMap:
-
     """Validate and process actions defined into an actions map
 
     The actions map defines the features - and their usage - of an
diff --git a/moulinette/authentication.py b/moulinette/authentication.py
index bf2f76a3..40fdcbb0 100644
--- a/moulinette/authentication.py
+++ b/moulinette/authentication.py
@@ -11,7 +11,6 @@ logger = logging.getLogger("moulinette.authenticator")
 
 
 class BaseAuthenticator:
-
     """Authenticator base representation
 
     Each authenticators must implement an Authenticator class derived
diff --git a/moulinette/core.py b/moulinette/core.py
index e83f716b..e5370c2c 100644
--- a/moulinette/core.py
+++ b/moulinette/core.py
@@ -18,7 +18,6 @@ def during_unittests_run():
 
 
 class Translator:
-
     """Internationalization class
 
     Provide an internationalization mechanism based on JSON files to
@@ -173,7 +172,6 @@ class Translator:
 
 
 class Moulinette18n:
-
     """Internationalization service for the moulinette
 
     Manage internationalization and access to the proper keys translation
@@ -270,7 +268,6 @@ class MoulinetteAuthenticationError(MoulinetteError):
 
 
 class MoulinetteLock:
-
     """Locker for a moulinette instance
 
     It provides a lock mechanism for a given moulinette instance. It can
diff --git a/moulinette/interfaces/__init__.py b/moulinette/interfaces/__init__.py
index 54776552..db814159 100644
--- a/moulinette/interfaces/__init__.py
+++ b/moulinette/interfaces/__init__.py
@@ -18,7 +18,6 @@ logger = logging.getLogger("moulinette.interface")
 
 
 class BaseActionsMapParser:
-
     """Actions map's base Parser
 
     Each interfaces must implement an ActionsMapParser class derived
@@ -148,7 +147,6 @@ class BaseActionsMapParser:
 
 
 class _ExtendedSubParsersAction(argparse._SubParsersAction):
-
     """Subparsers with extended properties for argparse
 
     It provides the following additional properties at initialization,
@@ -448,7 +446,6 @@ class PositionalsFirstHelpFormatter(argparse.HelpFormatter):
 
 
 class JSONExtendedEncoder(JSONEncoder):
-
     """Extended JSON encoder
 
     Extend default JSON encoder to recognize more types and classes. It will
diff --git a/moulinette/interfaces/api.py b/moulinette/interfaces/api.py
index 34b51143..d5132c9c 100644
--- a/moulinette/interfaces/api.py
+++ b/moulinette/interfaces/api.py
@@ -66,14 +66,12 @@ def filter_csrf(callback):
 
 
 class LogQueues(dict):
-
     """Map of session ids to queue."""
 
     pass
 
 
 class APIQueueHandler(logging.Handler):
-
     """
     A handler class which store logging records into a queue, to be used
     and retrieved from the API.
@@ -109,7 +107,6 @@ class APIQueueHandler(logging.Handler):
 
 
 class _HTTPArgumentParser:
-
     """Argument parser for HTTP requests
 
     Object for parsing HTTP requests into Python objects. It is based
@@ -547,7 +544,6 @@ def format_for_response(content):
 
 
 class ActionsMapParser(BaseActionsMapParser):
-
     """Actions map's Parser for the API
 
     Provide actions map parsing methods for a CLI usage. The parser for
@@ -691,7 +687,6 @@ class ActionsMapParser(BaseActionsMapParser):
 
 
 class Interface:
-
     """Application Programming Interface for the moulinette
 
     Initialize a HTTP server which serves the API connected to a given
diff --git a/moulinette/interfaces/cli.py b/moulinette/interfaces/cli.py
index 84e72185..b4c42ebc 100644
--- a/moulinette/interfaces/cli.py
+++ b/moulinette/interfaces/cli.py
@@ -208,7 +208,6 @@ def get_locale():
 
 
 class TTYHandler(logging.StreamHandler):
-
     """TTY log handler
 
     A handler class which prints logging records for a tty. The record is
@@ -274,7 +273,6 @@ class TTYHandler(logging.StreamHandler):
 
 
 class ActionsMapParser(BaseActionsMapParser):
-
     """Actions map's Parser for the CLI
 
     Provide actions map parsing methods for a CLI usage. The parser for
@@ -446,7 +444,6 @@ class ActionsMapParser(BaseActionsMapParser):
 
 
 class Interface:
-
     """Command-line Interface for the moulinette
 
     Initialize an interface connected to the standard input/output
diff --git a/moulinette/utils/log.py b/moulinette/utils/log.py
index 02f8a30a..08fec631 100644
--- a/moulinette/utils/log.py
+++ b/moulinette/utils/log.py
@@ -85,7 +85,6 @@ def getHandlersByClass(classinfo, limit=0):
 
 
 class MoulinetteLogger(Logger):
-
     """Custom logger class
 
     Extend base Logger class to provide the SUCCESS custom log level with
@@ -173,7 +172,6 @@ def getActionLogger(name=None, logger=None, action_id=None):
 
 
 class ActionFilter:
-
     """Extend log record for an optionnal action
 
     Filter a given record and look for an `action_id` key. If it is not found
diff --git a/test/src/authenticators/dummy.py b/test/src/authenticators/dummy.py
index 1d11a609..cef42c34 100644
--- a/test/src/authenticators/dummy.py
+++ b/test/src/authenticators/dummy.py
@@ -13,7 +13,6 @@ session_secret = random_ascii()
 
 
 class Authenticator(BaseAuthenticator):
-
     """Dummy authenticator used for tests"""
 
     name = "dummy"
diff --git a/test/src/authenticators/yoloswag.py b/test/src/authenticators/yoloswag.py
index 7dc41fdc..f68122c9 100644
--- a/test/src/authenticators/yoloswag.py
+++ b/test/src/authenticators/yoloswag.py
@@ -13,7 +13,6 @@ session_secret = random_ascii()
 
 
 class Authenticator(BaseAuthenticator):
-
     """Dummy authenticator used for tests"""
 
     name = "yoloswag"