diff --git a/l10n_br_fiscal/models/document_event.py b/l10n_br_fiscal/models/document_event.py
index d613ce041e9f..363b5f977b6f 100644
--- a/l10n_br_fiscal/models/document_event.py
+++ b/l10n_br_fiscal/models/document_event.py
@@ -235,7 +235,7 @@ def _save_event_2disk(self, arquivo, file_name):
             if not os.path.exists(save_dir):
                 os.makedirs(save_dir)
             f = open(file_path, "w")
-        except IOError as e:
+        except OSError as e:
             raise UserError(
                 _("Erro!"),
                 _(
diff --git a/l10n_br_fiscal/models/subsequent_document.py b/l10n_br_fiscal/models/subsequent_document.py
index 58b7c6dd3515..9b93b03d351a 100644
--- a/l10n_br_fiscal/models/subsequent_document.py
+++ b/l10n_br_fiscal/models/subsequent_document.py
@@ -3,7 +3,6 @@
 # License AGPL-3 or later (http://www.gnu.org/licenses/agpl)
 #
 
-from __future__ import division, print_function, unicode_literals
 
 from odoo import api, fields, models
 
diff --git a/l10n_br_fiscal/models/subsequent_operation.py b/l10n_br_fiscal/models/subsequent_operation.py
index c4864d6a1f6d..4e3835f9232e 100644
--- a/l10n_br_fiscal/models/subsequent_operation.py
+++ b/l10n_br_fiscal/models/subsequent_operation.py
@@ -2,8 +2,6 @@
 # License AGPL-3 - See http://www.gnu.org/licenses/agpl-3.0.html
 
 
-from __future__ import division, print_function, unicode_literals
-
 from odoo import fields, models
 
 from ..constants.fiscal import SITUACAO_EDOC
diff --git a/l10n_br_fiscal/wizards/document_import_wizard_mixin.py b/l10n_br_fiscal/wizards/document_import_wizard_mixin.py
index 6231fdcaac67..f6729a29cdc2 100644
--- a/l10n_br_fiscal/wizards/document_import_wizard_mixin.py
+++ b/l10n_br_fiscal/wizards/document_import_wizard_mixin.py
@@ -3,7 +3,7 @@
 
 from odoo import fields, models
 
-from odoo.addons.l10n_br_fiscal.constants.fiscal import FISCAL_IN_OUT_ALL
+from ..constants.fiscal import FISCAL_IN_OUT_ALL
 
 
 class DocumentImportWizardMixin(models.TransientModel):
diff --git a/l10n_br_fiscal_dfe/tests/test_dfe.py b/l10n_br_fiscal_dfe/tests/test_dfe.py
index 6c5e27351455..659886b38b10 100644
--- a/l10n_br_fiscal_dfe/tests/test_dfe.py
+++ b/l10n_br_fiscal_dfe/tests/test_dfe.py
@@ -20,7 +20,7 @@
 response_rejeicao = """<?xml version="1.0" encoding="UTF-8"?><soap:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><nfeDistDFeInteresseResponse xmlns="http://www.portalfiscal.inf.br/nfe/wsdl/NFeDistribuicaoDFe"><nfeDistDFeInteresseResult><retDistDFeInt xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.portalfiscal.inf.br/nfe" versao="1.01"><tpAmb>2</tpAmb><verAplic>1.4.0</verAplic><cStat>589</cStat><xMotivo>Rejeicao: Numero do NSU informado superior ao maior NSU da base de dados doAmbiente Nacional</xMotivo><dhResp>2022-04-04T11:54:49-03:00</dhResp><ultNSU>000000000000000</ultNSU><maxNSU>000000000000000</maxNSU></retDistDFeInt></nfeDistDFeInteresseResult></nfeDistDFeInteresseResponse></soap:Body></soap:Envelope>"""
 
 
-class FakeRetorno(object):
+class FakeRetorno:
     def __init__(self, text, status_code=200):
         self.text = text
         self.content = text.encode("utf-8")
diff --git a/l10n_br_ie_search/tests/test_sefaz.py b/l10n_br_ie_search/tests/test_sefaz.py
index 0f78e80486ef..4a348e3d1aec 100644
--- a/l10n_br_ie_search/tests/test_sefaz.py
+++ b/l10n_br_ie_search/tests/test_sefaz.py
@@ -12,7 +12,7 @@
 from odoo.tools.misc import format_date
 
 
-class FakeRetorno(object):
+class FakeRetorno:
     __slots__ = "text", "ok"
 
 
diff --git a/l10n_br_ie_search/tests/test_sintegra.py b/l10n_br_ie_search/tests/test_sintegra.py
index 1d19c5f6f003..8fa5d867b477 100644
--- a/l10n_br_ie_search/tests/test_sintegra.py
+++ b/l10n_br_ie_search/tests/test_sintegra.py
@@ -10,7 +10,7 @@
 _logger = logging.getLogger(__name__)
 
 
-class FakeRetorno(object):
+class FakeRetorno:
     __slots__ = "text", "status_code"
 
     def json(self):
diff --git a/l10n_br_nfe/tests/test_nfce.py b/l10n_br_nfe/tests/test_nfce.py
index f906ce753784..09107069f056 100644
--- a/l10n_br_nfe/tests/test_nfce.py
+++ b/l10n_br_nfe/tests/test_nfce.py
@@ -38,7 +38,7 @@
 response_contingency = """<?xml version="1.0" encoding="UTF-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><nfeResultMsg xmlns="http://www.portalfiscal.inf.br/nfe/wsdl/NFeAutorizacao4"><retEnviNFe xmlns="http://www.portalfiscal.inf.br/nfe" versao="4.00"><tpAmb>2</tpAmb><verAplic>4.0.0</verAplic><cStat>108</cStat><xMotivo>Rejeição: Duplicidade de NF-e</xMotivo><cUF>33</cUF><dhRecbto>2023-08-08T10:30:00-03:00</dhRecbto><infRec><nRec>123456789012345</nRec><tMed>1</tMed></infRec></retEnviNFe></nfeResultMsg></soap:Body></soap:Envelope>"""
 
 
-class FakeRetorno(object):
+class FakeRetorno:
     def __init__(self, text):
         self.text = text
         self.content = text.encode("utf-8")
diff --git a/l10n_br_nfe/tests/test_nfe_mde.py b/l10n_br_nfe/tests/test_nfe_mde.py
index 822873c651a5..245a7e7c63e5 100644
--- a/l10n_br_nfe/tests/test_nfe_mde.py
+++ b/l10n_br_nfe/tests/test_nfe_mde.py
@@ -27,7 +27,7 @@
 response_operacao_nao_realizada = """<?xml version="1.0" encoding="UTF-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><soap:Body><nfeResultMsg xmlns="http://www.portalfiscal.inf.br/nfe/wsdl/NFeRecepcaoEvento4"><retEnvEvento xmlns="http://www.portalfiscal.inf.br/nfe" versao="1.00"><idLote /><tpAmb>2</tpAmb><verAplic>SVRS202305251555</verAplic><cStat>135</cStat><retEvento versao="1.00"><infEvento><tpAmb>2</tpAmb><verAplic>SVRS202305251555</verAplic><cStat>135</cStat><xMotivo>Teste Operação não Realizada.</xMotivo><chNFe>31201010588201000105550010038421171838422178</chNFe><tpEvento>210240</tpEvento><xEvento>Operacao nao Realizada registrada</xEvento><nSeqEvento>1</nSeqEvento><CNPJDest>81583054000129</CNPJDest><dhRegEvento>2023-07-10T10:00:00-03:00</dhRegEvento></infEvento></retEvento></retEnvEvento></nfeResultMsg></soap:Body></soap:Envelope>"""
 
 
-class FakeRetorno(object):
+class FakeRetorno:
     def __init__(self, text, status_code=200):
         self.text = text
         self.content = text.encode("utf-8")
diff --git a/l10n_br_nfe/tests/test_nfe_webservices.py b/l10n_br_nfe/tests/test_nfe_webservices.py
index 975f333eaa76..0c4cff6675d9 100644
--- a/l10n_br_nfe/tests/test_nfe_webservices.py
+++ b/l10n_br_nfe/tests/test_nfe_webservices.py
@@ -53,7 +53,7 @@ def is_libreoffice_command_available():
         return False
 
 
-class FakeRetorno(object):
+class FakeRetorno:
     def __init__(self, text):
         self.text = text
         self.content = text.encode("utf-8")