diff --git a/addons/account/models/account_reconcile_model.py b/addons/account/models/account_reconcile_model.py
index 5f5ef90618d..ad46f3bb738 100644
--- a/addons/account/models/account_reconcile_model.py
+++ b/addons/account/models/account_reconcile_model.py
@@ -22,6 +22,7 @@ class AccountReconcileModelPartnerMapping(models.Model):
         for record in self:
             if not (record.narration_regex or record.payment_ref_regex):
                 raise ValidationError(_("Please set at least one of the match texts to create a partner mapping."))
+            current_regex = None
             try:
                 if record.payment_ref_regex:
                     current_regex = record.payment_ref_regex
diff --git a/addons/hw_escpos/controllers/main.py b/addons/hw_escpos/controllers/main.py
index a436fab2b66..dbe2b12bcc5 100644
--- a/addons/hw_escpos/controllers/main.py
+++ b/addons/hw_escpos/controllers/main.py
@@ -148,10 +148,9 @@ class EscposDriver(Thread):
             _logger.error('ESC/POS cannot initialize, please verify system dependencies.')
             return
         while True:
+            error = True
+            timestamp, task, data = self.queue.get(True)
             try:
-                error = True
-                timestamp, task, data = self.queue.get(True)
-
                 printer = self.get_escpos_printer()
 
                 if printer == None:
diff --git a/addons/mail/models/fetchmail.py b/addons/mail/models/fetchmail.py
index 9212d168378..430f14f0565 100644
--- a/addons/mail/models/fetchmail.py
+++ b/addons/mail/models/fetchmail.py
@@ -152,6 +152,7 @@ odoo_mailgate: "|/path/to/odoo-mailgate.py --host=localhost -u %(uid)d -p PASSWO
 
     def button_confirm_login(self):
         for server in self:
+            connection = None
             try:
                 connection = server.connect(allow_archived=True)
                 server.write({'state': 'done'})
diff --git a/addons/point_of_sale/models/pos_session.py b/addons/point_of_sale/models/pos_session.py
index c8240e69846..c46b2f62854 100644
--- a/addons/point_of_sale/models/pos_session.py
+++ b/addons/point_of_sale/models/pos_session.py
@@ -301,8 +301,8 @@ class PosSession(models.Model):
                 else:
                     raise e
 
+            balance = sum(self.move_id.line_ids.mapped('balance'))
             try:
-                balance = sum(self.move_id.line_ids.mapped('balance'))
                 with self.move_id._check_balanced({'records': self.move_id.sudo()}):
                     pass
             except UserError:
diff --git a/odoo/addons/base/tests/test_qweb.py b/odoo/addons/base/tests/test_qweb.py
index d90d161a978..e7cb9dc0645 100644
--- a/odoo/addons/base/tests/test_qweb.py
+++ b/odoo/addons/base/tests/test_qweb.py
@@ -662,6 +662,7 @@ class TestQWebNS(TransactionCase):
             """
         })
 
+        error_msg = None
         try:
             "" + 0
         except TypeError as e:
diff --git a/odoo/tests/common.py b/odoo/tests/common.py
index eec7360ef33..4cd8507d557 100644
--- a/odoo/tests/common.py
+++ b/odoo/tests/common.py
@@ -1264,12 +1264,14 @@ class ChromeBrowser:
         delay = 0.1
         tries = 0
         failure_info = None
+        message = None
         while timeout > 0:
             try:
                 os.kill(self.chrome_pid, 0)
             except ProcessLookupError:
                 message = 'Chrome crashed at startup'
                 break
+            res = None
             try:
                 r = requests.get(url, timeout=3)
                 if r.ok: