diff --git a/auth0/v3/authentication/base.py b/auth0/v3/authentication/base.py
index 7747da94..4d0ff93e 100644
--- a/auth0/v3/authentication/base.py
+++ b/auth0/v3/authentication/base.py
@@ -74,19 +74,19 @@ def __init__(self, status_code, content, headers):
         self._headers = headers
 
     def content(self):
-        if self._is_error():
-            if self._status_code == 429:
-                reset_at = int(self._headers.get('x-ratelimit-reset', '-1'))
-                raise RateLimitError(error_code=self._error_code(),
-                                     message=self._error_message(),
-                                     reset_at=reset_at)
-
-            raise Auth0Error(status_code=self._status_code,
-                             error_code=self._error_code(),
-                             message=self._error_message())
-        else:
+        if not self._is_error():
             return self._content
 
+        if self._status_code == 429:
+            reset_at = int(self._headers.get('x-ratelimit-reset', '-1'))
+            raise RateLimitError(error_code=self._error_code(),
+                                 message=self._error_message(),
+                                 reset_at=reset_at)
+
+        raise Auth0Error(status_code=self._status_code,
+                         error_code=self._error_code(),
+                         message=self._error_message())
+
     def _is_error(self):
         return self._status_code is None or self._status_code >= 400
 
diff --git a/auth0/v3/authentication/token_verifier.py b/auth0/v3/authentication/token_verifier.py
index 1f44c087..97e3c466 100644
--- a/auth0/v3/authentication/token_verifier.py
+++ b/auth0/v3/authentication/token_verifier.py
@@ -271,11 +271,13 @@ def _verify_payload(self, payload, nonce=None, max_age=None, organization=None):
             raise TokenValidationError('Subject (sub) claim must be a string present in the ID token')
 
         # Audience
-        if 'aud' not in payload or not (isinstance(payload['aud'], (str, ustr)) or isinstance(payload['aud'], list)):
+        if 'aud' not in payload or not isinstance(
+            payload['aud'], (str, ustr, list)
+        ):
             raise TokenValidationError(
                 'Audience (aud) claim must be a string or array of strings present in the ID token')
 
-        if isinstance(payload['aud'], list) and not self.aud in payload['aud']:
+        if isinstance(payload['aud'], list) and self.aud not in payload['aud']:
             payload_audiences = ", ".join(payload['aud'])
             raise TokenValidationError(
                 'Audience (aud) claim mismatch in the ID token; expected "{}" but was '
diff --git a/auth0/v3/management/organizations.py b/auth0/v3/management/organizations.py
index 653a7e33..19d38da6 100644
--- a/auth0/v3/management/organizations.py
+++ b/auth0/v3/management/organizations.py
@@ -143,10 +143,7 @@ def all_organization_connections(self, id, page=None, per_page=None):
 
         See: https://auth0.com/docs/api/management/v2#!/Organizations/get_enabled_connections
         """
-        params = {}
-        params['page'] = page
-        params['per_page'] = per_page
-
+        params = {'page': page, 'per_page': per_page}
         return self.client.get(self._url(id, 'enabled_connections'), params=params)
 
     def get_organization_connection(self, id, connection_id):
@@ -282,10 +279,7 @@ def all_organization_member_roles(self, id, user_id, page=None, per_page=None):
 
         See: https://auth0.com/docs/api/management/v2#!/Organizations/get_organization_member_roles
         """
-        params = {}
-        params['page'] = page
-        params['per_page'] = per_page
-
+        params = {'page': page, 'per_page': per_page}
         return self.client.get(self._url(id, 'members', user_id, 'roles'), params=params)
 
     def create_organization_member_roles(self, id, user_id, body):
@@ -334,10 +328,7 @@ def all_organization_invitations(self, id, page=None, per_page=None):
 
         See: https://auth0.com/docs/api/management/v2#!/Organizations/get_invitations
         """
-        params = {}
-        params['page'] = page
-        params['per_page'] = per_page
-
+        params = {'page': page, 'per_page': per_page}
         return self.client.get(self._url(id, 'invitations'), params=params)
 
     def get_organization_invitation(self, id, invitaton_id):
diff --git a/auth0/v3/management/users_by_email.py b/auth0/v3/management/users_by_email.py
index 64f00c3e..26f98ab8 100644
--- a/auth0/v3/management/users_by_email.py
+++ b/auth0/v3/management/users_by_email.py
@@ -29,8 +29,7 @@ def __init__(self, domain, token, telemetry=True, timeout=5.0, protocol="https",
         self.client = RestClient(jwt=token, telemetry=telemetry, timeout=timeout, options=rest_options)
 
     def _url(self):
-        url = '{}://{}/api/v2/users-by-email'.format(self.protocol, self.domain)
-        return url
+        return '{}://{}/api/v2/users-by-email'.format(self.protocol, self.domain)
 
     def search_users_by_email(self, email, fields=None, include_fields=True):
         """List or search users.