diff --git a/src/yunohost/backup.py b/src/yunohost/backup.py
index dfed5cac1..a22c33f15 100644
--- a/src/yunohost/backup.py
+++ b/src/yunohost/backup.py
@@ -177,11 +177,11 @@ class BackupRestoreTargetsManager(object):
             or (exclude and isinstance(exclude, list) and not include)
 
         if include:
-            return [target.encode("Utf-8") for target in self.targets[category]
+            return [target for target in self.targets[category]
                     if self.results[category][target] in include]
 
         if exclude:
-            return [target.encode("Utf-8") for target in self.targets[category]
+            return [target for target in self.targets[category]
                     if self.results[category][target] not in exclude]
 
 
diff --git a/src/yunohost/certificate.py b/src/yunohost/certificate.py
index fc81ae0a6..421303615 100644
--- a/src/yunohost/certificate.py
+++ b/src/yunohost/certificate.py
@@ -638,7 +638,7 @@ def _get_status(domain):
     cert_subject = cert.get_subject().CN
     cert_issuer = cert.get_issuer().CN
     organization_name = cert.get_issuer().O
-    valid_up_to = datetime.strptime(cert.get_notAfter(), "%Y%m%d%H%M%SZ")
+    valid_up_to = datetime.strptime(cert.get_notAfter().decode('utf-8'), "%Y%m%d%H%M%SZ")
     days_remaining = (valid_up_to - datetime.utcnow()).days
 
     if cert_issuer == _name_self_CA():
diff --git a/src/yunohost/diagnosis.py b/src/yunohost/diagnosis.py
index e4dd84f6d..93ece21fc 100644
--- a/src/yunohost/diagnosis.py
+++ b/src/yunohost/diagnosis.py
@@ -451,7 +451,7 @@ class Diagnoser():
         key = "diagnosis_description_" + id_
         descr = m18n.n(key)
         # If no description available, fallback to id
-        return descr if descr.decode('utf-8') != key else id_
+        return descr if descr != key else id_
 
     @staticmethod
     def i18n(report, force_remove_html_tags=False):