diff --git a/NEWS.rst b/NEWS.rst
index e6330dda2ab190b761639864d048a4452956b2ff_TkVXUy5yc3Q=..4d31b40354b57ac4d4123ce4b18409dd879c0645_TkVXUy5yc3Q= 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -2,6 +2,11 @@
 History
 =======
 
+12.0.0
+------
+
+Default to not doing flake8 and isort in do_tests.
+
 11.1.0
 ------
 
diff --git a/odoo_scripts/do_tests.py b/odoo_scripts/do_tests.py
index e6330dda2ab190b761639864d048a4452956b2ff_b2Rvb19zY3JpcHRzL2RvX3Rlc3RzLnB5..4d31b40354b57ac4d4123ce4b18409dd879c0645_b2Rvb19zY3JpcHRzL2RvX3Rlc3RzLnB5 100755
--- a/odoo_scripts/do_tests.py
+++ b/odoo_scripts/do_tests.py
@@ -14,10 +14,10 @@
 
 from .config import Config
 from .docker_dev_start import main as docker_dev_start_main
-from .docker_flake8 import flake8
-from .docker_isort import isort
+from .docker_flake8 import apply_flake8, parser_add_flake8_group
+from .docker_isort import apply_isort, parser_add_isort_group
 from .docker_postgresql import POSTGRES_PASSWORD
 from .parsing import apply, basic_parser
 
 _logger = logging.getLogger(__name__)
 
@@ -19,7 +19,7 @@
 from .docker_postgresql import POSTGRES_PASSWORD
 from .parsing import apply, basic_parser
 
 _logger = logging.getLogger(__name__)
 
-__version__ = "2.0.0"
+__version__ = "3.0.0"
 __date__ = "2018-04-13"
@@ -25,5 +25,5 @@
 __date__ = "2018-04-13"
-__updated__ = "2020-09-15"
+__updated__ = "2021-10-21"
 
 
 def main(argv=None):  # IGNORE:C0111
@@ -148,6 +148,8 @@
         default=None,
         dest="LOAD_LANGUAGE",
     )
+    parser_add_flake8_group(parser)
+    parser_add_isort_group(parser)
     # TODO options
     # - db host/uri (include socket)
     # - db user for creation/remove
@@ -244,9 +246,8 @@
             args.append("--dbport")
             args.append(dbport)
 
-    # only run flake8 and isort once rather than once per docker_dev_start call
-    flake8(odoo_type)
-    isort()
+    apply_flake8(nmspc, odoo_type)
+    apply_isort(nmspc)
     if nmspc.log_handler:
         for lh in nmspc.log_handler:
             args.append("--log-handler")
diff --git a/odoo_scripts/docker_dev_start.py b/odoo_scripts/docker_dev_start.py
index e6330dda2ab190b761639864d048a4452956b2ff_b2Rvb19zY3JpcHRzL2RvY2tlcl9kZXZfc3RhcnQucHk=..4d31b40354b57ac4d4123ce4b18409dd879c0645_b2Rvb19zY3JpcHRzL2RvY2tlcl9kZXZfc3RhcnQucHk= 100755
--- a/odoo_scripts/docker_dev_start.py
+++ b/odoo_scripts/docker_dev_start.py
@@ -18,8 +18,8 @@
 from . import docker_build
 from .config import Config
 from .docker_client import DockerClient
-from .docker_flake8 import flake8
-from .docker_isort import isort
+from .docker_flake8 import apply_flake8, parser_add_flake8_group
+from .docker_isort import apply_isort, parser_add_isort_group
 from .docker_postgresql import POSTGRES_PASSWORD, docker_run_postgresql
 from .docker_py3o import start_py3o
 from .parsing import apply, basic_parser
@@ -46,7 +46,7 @@
     program_license = """%s
 
   Created by Vincent Hatakeyama on %s.
-  Copyright 2017, 2018, 2019, 2020 XCG Consulting. All rights reserved.
+  Copyright 2017, 2018, 2019, 2020, 2021 XCG Consulting. All rights reserved.
 
   Licensed under the MIT License
 
@@ -156,36 +156,8 @@
         help="Start a Postgresql docker",
         action="store_true",
     )
-    flake8_group = parser.add_mutually_exclusive_group()
-    flake8_group.add_argument(
-        "--flake8",
-        help="Run flake8",
-        action="store_true",
-        dest="flake8",
-        default=False,
-    )
-    flake8_group.add_argument(
-        "--no-flake8",
-        help="Do not run flake8 [default]",
-        action="store_false",
-        dest="flake8",
-        default=False,
-    )
-    isort_group = parser.add_mutually_exclusive_group()
-    isort_group.add_argument(
-        "--isort",
-        help="Run isort",
-        action="store_true",
-        dest="isort",
-        default=False,
-    )
-    isort_group.add_argument(
-        "--no-isort",
-        help="Do not run isort [default]",
-        action="store_false",
-        dest="isort",
-        default=False,
-    )
+    parser_add_flake8_group(parser)
+    parser_add_isort_group(parser)
     parser.add_argument(
         "--odoo-help",
         help="Pass --help to odoo binary [default: %(default)s]",
@@ -317,8 +289,6 @@
     use_host_network = nmspc.host_network
     _logger.debug("Use host network: %s", str(use_host_network))
     start_postgresql = nmspc.start_postgresql
-    run_flake8 = nmspc.flake8
-    run_isort = nmspc.isort
     odoo_help = nmspc.odoo_help
     dev = nmspc.dev
     dev_opts = nmspc.dev_opts
@@ -789,11 +759,8 @@
         arg.append("--addons-path")
         arg.append(",".join(all_addons_dir))
 
-    if run_flake8:
-        flake8(odoo_type)
-
-    if run_isort:
-        isort()
+    apply_flake8(nmspc, odoo_type)
+    apply_isort(nmspc)
 
     # developer mode options
     if dev:
diff --git a/odoo_scripts/docker_flake8.py b/odoo_scripts/docker_flake8.py
index e6330dda2ab190b761639864d048a4452956b2ff_b2Rvb19zY3JpcHRzL2RvY2tlcl9mbGFrZTgucHk=..4d31b40354b57ac4d4123ce4b18409dd879c0645_b2Rvb19zY3JpcHRzL2RvY2tlcl9mbGFrZTgucHk= 100644
--- a/odoo_scripts/docker_flake8.py
+++ b/odoo_scripts/docker_flake8.py
@@ -2,6 +2,7 @@
 # vim: set shiftwidth=4 softtabstop=4:
 """Run flake8 in a docker
 """
+import argparse
 import atexit
 import logging
 import os
@@ -45,4 +46,30 @@
     return parser
 
 
+def parser_add_flake8_group(parser: argparse.ArgumentParser):
+    """Add flake8 option (--flake8/--no-flake8) to the given parser.
+    Defaults to not using flake8."""
+    flake8_group = parser.add_mutually_exclusive_group()
+    flake8_group.add_argument(
+        "--flake8",
+        help="Run flake8",
+        action="store_true",
+        dest="flake8",
+        default=False,
+    )
+    flake8_group.add_argument(
+        "--no-flake8",
+        help="Do not run flake8 [default]",
+        action="store_false",
+        dest="flake8",
+        default=False,
+    )
+
+
+def apply_flake8(namespace: argparse.Namespace, odoo_type: str):
+    """Run flake8 if the option was set."""
+    if namespace.flake8:
+        flake8(odoo_type)
+
+
 def main(argv=None):
@@ -48,6 +75,5 @@
 def main(argv=None):
-    """Copy modules for a build, callable version that parses arguments
-    """
+    """Copy modules for a build, callable version that parses arguments"""
     parser = __parser()
     nmspc = parser.parse_args(argv)
     apply(nmspc)
@@ -56,9 +82,8 @@
     return flake8(odoo_type)
 
 
-def flake8(odoo_type):
-    """Run flake8
-    """
+def flake8(odoo_type: str):
+    """Run flake8"""
     client = DockerClient.client
     repository = "xcgd/flake8"
     if odoo_type in ("odoo7", "odoo8", "odoo9", "odoo10"):
diff --git a/odoo_scripts/docker_isort.py b/odoo_scripts/docker_isort.py
index e6330dda2ab190b761639864d048a4452956b2ff_b2Rvb19zY3JpcHRzL2RvY2tlcl9pc29ydC5weQ==..4d31b40354b57ac4d4123ce4b18409dd879c0645_b2Rvb19zY3JpcHRzL2RvY2tlcl9pc29ydC5weQ== 100644
--- a/odoo_scripts/docker_isort.py
+++ b/odoo_scripts/docker_isort.py
@@ -2,6 +2,7 @@
 # vim: set shiftwidth=4 softtabstop=4:
 """Run isort in a docker
 """
+import argparse
 import atexit
 import logging
 import os
@@ -12,5 +13,5 @@
 from .docker_client import DockerClient
 from .parsing import apply, basic_parser
 
-__version__ = "1.0.0"
+__version__ = "1.0.1"
 __date__ = "2020-09-10"
@@ -16,5 +17,5 @@
 __date__ = "2020-09-10"
-__updated__ = "2020-09-10"
+__updated__ = "2021-10-21"
 
 _logger = logging.getLogger(__name__)
 
@@ -46,4 +47,30 @@
     return parser
 
 
+def parser_add_isort_group(parser: argparse.ArgumentParser):
+    """Add isort option (--isort/--no-isort) to the given parser.
+    Defaults to not using isort."""
+    isort_group = parser.add_mutually_exclusive_group()
+    isort_group.add_argument(
+        "--isort",
+        help="Run isort",
+        action="store_true",
+        dest="isort",
+        default=False,
+    )
+    isort_group.add_argument(
+        "--no-isort",
+        help="Do not run isort [default]",
+        action="store_false",
+        dest="isort",
+        default=False,
+    )
+
+
+def apply_isort(namespace: argparse.Namespace):
+    """Run isort if the option was set."""
+    if namespace.isort:
+        isort()
+
+
 def main(argv=None):
@@ -49,6 +76,5 @@
 def main(argv=None):
-    """Copy modules for a build, callable version that parses arguments
-    """
+    """Copy modules for a build, callable version that parses arguments"""
     parser = __parser()
     nmspc = parser.parse_args(argv)
     apply(nmspc)
@@ -57,8 +83,7 @@
 
 
 def isort(pull=True):
-    """Run isort
-    """
+    """Run isort"""
     client = DockerClient.client
     if pull:
         _logger.info("Pulling isort")