diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index ffc1de378..8e1d55671 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -926,12 +926,12 @@ def dump_app_log_extract_for_debugging(operation_logger):
         r"ynh_script_progression"
     ]
 
-    filters = [re.compile(f) for f in filters]
+    filters = [re.compile(f_) for f_ in filters]
 
     lines_to_display = []
     for line in lines:
 
-        if not ": " in line.strip():
+        if ": " not in line.strip():
             continue
 
         # A line typically looks like
diff --git a/src/yunohost/domain.py b/src/yunohost/domain.py
index f1dcefba9..b63a269c6 100644
--- a/src/yunohost/domain.py
+++ b/src/yunohost/domain.py
@@ -528,10 +528,10 @@ def _build_dns_conf(domain, ttl=3600, include_empty_AAAA_if_no_ipv6=False):
     ####################
 
     records = {
-        "basic": [{"name": name, "ttl": ttl, "type": type_, "value": value} for name, ttl, type_, value in basic],
-        "xmpp": [{"name": name, "ttl": ttl, "type": type_, "value": value} for name, ttl, type_, value in xmpp],
-        "mail": [{"name": name, "ttl": ttl, "type": type_, "value": value} for name, ttl, type_, value in mail],
-        "extra": [{"name": name, "ttl": ttl, "type": type_, "value": value} for name, ttl, type_, value in extra],
+        "basic": [{"name": name, "ttl": ttl_, "type": type_, "value": value} for name, ttl_, type_, value in basic],
+        "xmpp": [{"name": name, "ttl": ttl_, "type": type_, "value": value} for name, ttl_, type_, value in xmpp],
+        "mail": [{"name": name, "ttl": ttl_, "type": type_, "value": value} for name, ttl_, type_, value in mail],
+        "extra": [{"name": name, "ttl": ttl_, "type": type_, "value": value} for name, ttl_, type_, value in extra],
     }
 
     ##################
diff --git a/src/yunohost/service.py b/src/yunohost/service.py
index c17eb04c2..029ecf77c 100644
--- a/src/yunohost/service.py
+++ b/src/yunohost/service.py
@@ -26,7 +26,6 @@
 
 import re
 import os
-import re
 import time
 import yaml
 import subprocess